26400657713 has 4 divisors (see below), whose sum is σ = 26672829540. Its totient is φ = 26128485888.

The previous prime is 26400657697. The next prime is 26400657763. The reversal of 26400657713 is 31775600462.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4042034929 + 22358622784 = 63577^2 + 149528^2 .

It is a cyclic number.

It is not a de Polignac number, because 26400657713 - 2⁴ = 26400657697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26400657763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136085768 + ... + 136085961.

It is an arithmetic number, because the mean of its divisors is an integer number (6668207385).

Almost surely, 2^26400657713 is an apocalyptic number.

It is an amenable number.

26400657713 is a deficient number, since it is larger than the sum of its proper divisors (272171827).

26400657713 is an equidigital number, since it uses as much as digits as its factorization.

26400657713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272171826.

The product of its (nonzero) digits is 211680, while the sum is 41.

The spelling of 26400657713 in words is "twenty-six billion, four hundred million, six hundred fifty-seven thousand, seven hundred thirteen".