15256994208255 has 32 divisors (see below), whose sum is σ = 27126298771200. Its totient is φ = 8136237524256.

The previous prime is 15256994208241. The next prime is 15256994208257. The reversal of 15256994208255 is 55280249965251.

It is a happy number.

15256994208255 is a `hidden beast` number, since 1 + 5 + 2 + 569 + 9 + 42 + 0 + 8 + 25 + 5 = 666.

It is not a de Polignac number, because 15256994208255 - 2⁶ = 15256994208191 is a prime.

It is a super-2 number, since 2×15256994208255² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15256994208192 and 15256994208201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15256994208257) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4400589 + ... + 7062518.

It is an arithmetic number, because the mean of its divisors is an integer number (847696836600).

Almost surely, 2^{15256994208255} is an apocalyptic number.

15256994208255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15256994208255 is a deficient number, since it is larger than the sum of its proper divisors (11869304562945).

15256994208255 is a wasteful number, since it uses less digits than its factorization.

15256994208255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11472980 (or 11472974 counting only the distinct ones).

The product of its (nonzero) digits is 77760000, while the sum is 63.

The spelling of 15256994208255 in words is "fifteen trillion, two hundred fifty-six billion, nine hundred ninety-four million, two hundred eight thousand, two hundred fifty-five".