15256812855 has 32 divisors (see below), whose sum is σ = 25289184960. Its totient is φ = 7845017600.

The previous prime is 15256812839. The next prime is 15256812863. The reversal of 15256812855 is 55821865251.

It is not a de Polignac number, because 15256812855 - 2⁴ = 15256812839 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 279919 + ... + 329951.

It is an arithmetic number, because the mean of its divisors is an integer number (790287030).

Almost surely, 2^15256812855 is an apocalyptic number.

15256812855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15256812855 is a deficient number, since it is larger than the sum of its proper divisors (10032372105).

15256812855 is a wasteful number, since it uses less digits than its factorization.

15256812855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50771.

The product of its digits is 960000, while the sum is 48.

The spelling of 15256812855 in words is "fifteen billion, two hundred fifty-six million, eight hundred twelve thousand, eight hundred fifty-five".