264664460820 has 96 divisors (see below), whose sum is σ = 742691980800. Its totient is φ = 70421991424.

The previous prime is 264664460803. The next prime is 264664460831. The reversal of 264664460820 is 28064466462.

It is a super-2 number, since 2×264664460820² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 264664460820.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99608932 + ... + 99611588.

It is an arithmetic number, because the mean of its divisors is an integer number (7736374800).

Almost surely, 2^264664460820 is an apocalyptic number.

264664460820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

264664460820 is an abundant number, since it is smaller than the sum of its proper divisors (478027519980).

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

264664460820 is a wasteful number, since it uses less digits than its factorization.

264664460820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5697 (or 5695 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 48.

The spelling of 264664460820 in words is "two hundred sixty-four billion, six hundred sixty-four million, four hundred sixty thousand, eight hundred twenty".