26649905757 has 4 divisors (see below), whose sum is σ = 35533207680. Its totient is φ = 17766603836.

The previous prime is 26649905731. The next prime is 26649905759. The reversal of 26649905757 is 75750994662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 26649905757 - 2⁶ = 26649905693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26649905757.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26649905759) 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, 4441650957 + ... + 4441650962.

It is an arithmetic number, because the mean of its divisors is an integer number (8883301920).

Almost surely, 2^26649905757 is an apocalyptic number.

It is an amenable number.

26649905757 is a deficient number, since it is larger than the sum of its proper divisors (8883301923).

26649905757 is an equidigital number, since it uses as much as digits as its factorization.

26649905757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8883301922.

The product of its (nonzero) digits is 28576800, while the sum is 60.

The spelling of 26649905757 in words is "twenty-six billion, six hundred forty-nine million, nine hundred five thousand, seven hundred fifty-seven".