264404113505021 has 24 divisors (see below), whose sum is σ = 308443585559040. Its totient is φ = 225990107354592.

The previous prime is 264404113504997. The next prime is 264404113505027. The reversal of 264404113505021 is 120505311404462.

It is not a de Polignac number, because 264404113505021 - 2⁶ = 264404113504957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264404113505027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 166324940 + ... + 167907098.

It is an arithmetic number, because the mean of its divisors is an integer number (12851816064960).

Almost surely, 2^{264404113505021} is an apocalyptic number.

It is an amenable number.

264404113505021 is a deficient number, since it is larger than the sum of its proper divisors (44039472054019).

264404113505021 is a wasteful number, since it uses less digits than its factorization.

264404113505021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1591833 (or 1591826 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 38.

Adding to 264404113505021 its reverse (120505311404462), we get a palindrome (384909424909483).

The spelling of 264404113505021 in words is "two hundred sixty-four trillion, four hundred four billion, one hundred thirteen million, five hundred five thousand, twenty-one".