155656913 has 8 divisors (see below), whose sum is σ = 165294432. Its totient is φ = 146072896.

The previous prime is 155656909. The next prime is 155656957. The reversal of 155656913 is 319656551.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155656913 - 2² = 155656909 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155656993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7295 + ... + 19092.

It is an arithmetic number, because the mean of its divisors is an integer number (20661804).

Almost surely, 2^155656913 is an apocalyptic number.

It is an amenable number.

155656913 is a deficient number, since it is larger than the sum of its proper divisors (9637519).

155656913 is a wasteful number, since it uses less digits than its factorization.

155656913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26751.

The product of its digits is 121500, while the sum is 41.

The square root of 155656913 is about 12476.2539650329. The cubic root of 155656913 is about 537.9263326025.

The spelling of 155656913 in words is "one hundred fifty-five million, six hundred fifty-six thousand, nine hundred thirteen".