26664532431 has 16 divisors (see below), whose sum is σ = 37108938240. Its totient is φ = 16998676640.

The previous prime is 26664532399. The next prime is 26664532457. The reversal of 26664532431 is 13423546662.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 26664532431 - 2⁵ = 26664532399 is a prime.

It is a super-2 number, since 2×26664532431² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26664532481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200665 + ... + 305933.

It is an arithmetic number, because the mean of its divisors is an integer number (2319308640).

Almost surely, 2^26664532431 is an apocalyptic number.

26664532431 is a deficient number, since it is larger than the sum of its proper divisors (10444405809).

26664532431 is a wasteful number, since it uses less digits than its factorization.

26664532431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108966.

The product of its digits is 622080, while the sum is 42.

The spelling of 26664532431 in words is "twenty-six billion, six hundred sixty-four million, five hundred thirty-two thousand, four hundred thirty-one".