26157488697 has 12 divisors (see below), whose sum is σ = 37791736164. Its totient is φ = 17434311840.

The previous prime is 26157488681. The next prime is 26157488743. The reversal of 26157488697 is 79688475162.

26157488697 is a `hidden beast` number, since 2 + 61 + 5 + 7 + 488 + 6 + 97 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 21992593401 + 4164895296 = 148299^2 + 64536^2 .

It is not a de Polignac number, because 26157488697 - 2⁴ = 26157488681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26157488647) 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, 292954 + ... + 371667.

It is an arithmetic number, because the mean of its divisors is an integer number (3149311347).

Almost surely, 2^26157488697 is an apocalyptic number.

It is an amenable number.

26157488697 is a deficient number, since it is larger than the sum of its proper divisors (11634247467).

26157488697 is a wasteful number, since it uses less digits than its factorization.

26157488697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669000 (or 668997 counting only the distinct ones).

The product of its digits is 40642560, while the sum is 63.

The spelling of 26157488697 in words is "twenty-six billion, one hundred fifty-seven million, four hundred eighty-eight thousand, six hundred ninety-seven".