26158156725257 has 12 divisors (see below), whose sum is σ = 27608451127920. Its totient is φ = 24780434068152.

The previous prime is 26158156725227. The next prime is 26158156725263. The reversal of 26158156725257 is 75252765185162.

It is a de Polignac number, because none of the positive numbers 2^k-26158156725257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26158156725257.

It is not an unprimeable number, because it can be changed into a prime (26158156725227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7817618 + ... + 10650420.

It is an arithmetic number, because the mean of its divisors is an integer number (2300704260660).

Almost surely, 2^{26158156725257} is an apocalyptic number.

It is an amenable number.

26158156725257 is a deficient number, since it is larger than the sum of its proper divisors (1450294402663).

26158156725257 is a wasteful number, since it uses less digits than its factorization.

26158156725257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2858420 (or 2858401 counting only the distinct ones).

The product of its digits is 70560000, while the sum is 62.

The spelling of 26158156725257 in words is "twenty-six trillion, one hundred fifty-eight billion, one hundred fifty-six million, seven hundred twenty-five thousand, two hundred fifty-seven".