26716564131257 has 32 divisors (see below), whose sum is σ = 35871753227520. Its totient is φ = 19216408273920.

The previous prime is 26716564131227. The next prime is 26716564131287. The reversal of 26716564131257 is 75213146561762.

It is an interprime number because it is at equal distance from previous prime (26716564131227) and next prime (26716564131287).

It is not a de Polignac number, because 26716564131257 - 2⁶ = 26716564131193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26716564131227) 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, 78461669 + ... + 78801437.

It is an arithmetic number, because the mean of its divisors is an integer number (1120992288360).

Almost surely, 2^{26716564131257} is an apocalyptic number.

It is an amenable number.

26716564131257 is a deficient number, since it is larger than the sum of its proper divisors (9155189096263).

26716564131257 is a wasteful number, since it uses less digits than its factorization.

26716564131257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418353.

The product of its digits is 12700800, while the sum is 56.

The spelling of 26716564131257 in words is "twenty-six trillion, seven hundred sixteen billion, five hundred sixty-four million, one hundred thirty-one thousand, two hundred fifty-seven".