155556360225 has 48 divisors (see below), whose sum is σ = 326586061440. Its totient is φ = 71111476800.

The previous prime is 155556360217. The next prime is 155556360233. The reversal of 155556360225 is 522063655551.

155556360225 is a `hidden beast` number, since 1 + 5 + 5 + 5 + 5 + 636 + 0 + 2 + 2 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (155556360217) and next prime (155556360233).

It is not a de Polignac number, because 155556360225 - 2³ = 155556360217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16456266 + ... + 16465715.

It is an arithmetic number, because the mean of its divisors is an integer number (6803876280).

Almost surely, 2^155556360225 is an apocalyptic number.

155556360225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155556360225 is an abundant number, since it is smaller than the sum of its proper divisors (171029701215).

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

155556360225 is a wasteful number, since it uses less digits than its factorization.

155556360225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32922007 (or 32921996 counting only the distinct ones).

The product of its (nonzero) digits is 1350000, while the sum is 45.

The spelling of 155556360225 in words is "one hundred fifty-five billion, five hundred fifty-six million, three hundred sixty thousand, two hundred twenty-five".