15250256643855 has 64 divisors (see below), whose sum is σ = 25290019086336. Its totient is φ = 7839080448000.

The previous prime is 15250256643821. The next prime is 15250256643863. The reversal of 15250256643855 is 55834665205251.

It is not a de Polignac number, because 15250256643855 - 2⁹ = 15250256643343 is a prime.

It is a super-2 number, since 2×15250256643855² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15250256643795 and 15250256643804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1241770315 + ... + 1241782595.

It is an arithmetic number, because the mean of its divisors is an integer number (395156548224).

Almost surely, 2^{15250256643855} is an apocalyptic number.

15250256643855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15250256643855 is a deficient number, since it is larger than the sum of its proper divisors (10039762442481).

15250256643855 is a wasteful number, since it uses less digits than its factorization.

15250256643855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22968.

The product of its (nonzero) digits is 43200000, while the sum is 57.

The spelling of 15250256643855 in words is "fifteen trillion, two hundred fifty billion, two hundred fifty-six million, six hundred forty-three thousand, eight hundred fifty-five".