155456905 has 8 divisors (see below), whose sum is σ = 187891200. Its totient is φ = 123470256.

The previous prime is 155456893. The next prime is 155456921. The reversal of 155456905 is 509654551.

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 155456905 - 2²⁷ = 21239177 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111145 + ... + 112534.

It is an arithmetic number, because the mean of its divisors is an integer number (23486400).

Almost surely, 2^155456905 is an apocalyptic number.

It is an amenable number.

155456905 is a deficient number, since it is larger than the sum of its proper divisors (32434295).

155456905 is a wasteful number, since it uses less digits than its factorization.

155456905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223823.

The product of its (nonzero) digits is 135000, while the sum is 40.

The square root of 155456905 is about 12468.2358415295. The cubic root of 155456905 is about 537.6958348957.

The spelling of 155456905 in words is "one hundred fifty-five million, four hundred fifty-six thousand, nine hundred five".