258256120155 has 16 divisors (see below), whose sum is σ = 450774319104. Its totient is φ = 125215088480.

The previous prime is 258256120117. The next prime is 258256120181. The reversal of 258256120155 is 551021652852.

It is not a de Polignac number, because 258256120155 - 2⁶ = 258256120091 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 782594139 + ... + 782594468.

It is an arithmetic number, because the mean of its divisors is an integer number (28173394944).

Almost surely, 2^258256120155 is an apocalyptic number.

258256120155 is a deficient number, since it is larger than the sum of its proper divisors (192518198949).

258256120155 is a wasteful number, since it uses less digits than its factorization.

258256120155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565188626.

The product of its (nonzero) digits is 240000, while the sum is 42.

The spelling of 258256120155 in words is "two hundred fifty-eight billion, two hundred fifty-six million, one hundred twenty thousand, one hundred fifty-five".