251398085023161 has 16 divisors (see below), whose sum is σ = 381525549088320. Its totient is φ = 163510949607840.

The previous prime is 251398085023159. The next prime is 251398085023171. The reversal of 251398085023161 is 161320580893152.

251398085023161 is a `hidden beast` number, since 2 + 5 + 13 + 98 + 0 + 8 + 502 + 31 + 6 + 1 = 666.

251398085023161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 251398085023161 - 2¹ = 251398085023159 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 251398085023098 and 251398085023107.

It is not an unprimeable number, because it can be changed into a prime (251398085023171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113549269455 + ... + 113549271668.

It is an arithmetic number, because the mean of its divisors is an integer number (23845346818020).

Almost surely, 2^{251398085023161} is an apocalyptic number.

It is an amenable number.

251398085023161 is a deficient number, since it is larger than the sum of its proper divisors (130127464065159).

251398085023161 is a wasteful number, since it uses less digits than its factorization.

251398085023161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227098541173 (or 227098541167 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 54.

The spelling of 251398085023161 in words is "two hundred fifty-one trillion, three hundred ninety-eight billion, eighty-five million, twenty-three thousand, one hundred sixty-one".