155559040 has 128 divisors (see below), whose sum is σ = 457873920. Its totient is φ = 49213440.

The previous prime is 155559037. The next prime is 155559067. The reversal of 155559040 is 40955551.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×155559040² = 48397229851443200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 155558987 and 155559005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56905 + ... + 59575.

It is an arithmetic number, because the mean of its divisors is an integer number (3577140).

Almost surely, 2^155559040 is an apocalyptic number.

155559040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155559040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228936960).

155559040 is an abundant number, since it is smaller than the sum of its proper divisors (302314880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155559040 is a wasteful number, since it uses less digits than its factorization.

155559040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2710 (or 2698 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 34.

The square root of 155559040 is about 12472.3309770067. The cubic root of 155559040 is about 537.8135642895.

The spelling of 155559040 in words is "one hundred fifty-five million, five hundred fifty-nine thousand, forty".