155664036 has 144 divisors (see below), whose sum is σ = 478820160. Its totient is φ = 42024960.

The previous prime is 155664031. The next prime is 155664059. The reversal of 155664036 is 630466551.

155664036 is a `hidden beast` number, since 1 + 5 + 5 + 6 + 640 + 3 + 6 = 666.

155664036 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (155664031) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 127300 + ... + 128516.

It is an arithmetic number, because the mean of its divisors is an integer number (3325140).

Almost surely, 2^155664036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155664036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239410080).

155664036 is an abundant number, since it is smaller than the sum of its proper divisors (323156124).

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

155664036 is a wasteful number, since it uses less digits than its factorization.

155664036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274 (or 1269 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 155664036 is about 12476.5394240551. The cubic root of 155664036 is about 537.9345378079.

The spelling of 155664036 in words is "one hundred fifty-five million, six hundred sixty-four thousand, thirty-six".