264440442464 has 24 divisors (see below), whose sum is σ = 567945951048. Its totient is φ = 120200200960.

The previous prime is 264440442457. The next prime is 264440442479. The reversal of 264440442464 is 464244044462.

It is a happy number.

264440442464 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×264440442464² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375625277 + ... + 375625980.

It is an arithmetic number, because the mean of its divisors is an integer number (23664414627).

Almost surely, 2^264440442464 is an apocalyptic number.

It is an amenable number.

264440442464 is an abundant number, since it is smaller than the sum of its proper divisors (303505508584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

264440442464 is a wasteful number, since it uses less digits than its factorization.

264440442464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751251278 (or 751251270 counting only the distinct ones).

The product of its (nonzero) digits is 2359296, while the sum is 44.

The spelling of 264440442464 in words is "two hundred sixty-four billion, four hundred forty million, four hundred forty-two thousand, four hundred sixty-four".