264440621465431 has 48 divisors (see below), whose sum is σ = 288689884254720. Its totient is φ = 241469832240000.

The previous prime is 264440621465389. The next prime is 264440621465453. The reversal of 264440621465431 is 134564126044462.

It is a de Polignac number, because none of the positive numbers 2^k-264440621465431 is a prime.

It is a super-2 number, since 2×264440621465431² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264440621445431) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3083776806 + ... + 3083862556.

It is an arithmetic number, because the mean of its divisors is an integer number (6014372588640).

Almost surely, 2^{264440621465431} is an apocalyptic number.

264440621465431 is a deficient number, since it is larger than the sum of its proper divisors (24249262789289).

264440621465431 is an equidigital number, since it uses as much as digits as its factorization.

264440621465431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86768 (or 86707 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 52.

The spelling of 264440621465431 in words is "two hundred sixty-four trillion, four hundred forty billion, six hundred twenty-one million, four hundred sixty-five thousand, four hundred thirty-one".