155053640 has 96 divisors (see below), whose sum is σ = 408758400. Its totient is φ = 52778880.

The previous prime is 155053637. The next prime is 155053669. The reversal of 155053640 is 46350551.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 468275 + ... + 468605.

It is an arithmetic number, because the mean of its divisors is an integer number (4257900).

Almost surely, 2^155053640 is an apocalyptic number.

155053640 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 155053640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204379200).

155053640 is an abundant number, since it is smaller than the sum of its proper divisors (253704760).

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

155053640 is a wasteful number, since it uses less digits than its factorization.

155053640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595 (or 584 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 155053640 is about 12452.0536458851. The cubic root of 155053640 is about 537.2304933377.

The spelling of 155053640 in words is "one hundred fifty-five million, fifty-three thousand, six hundred forty".