21264862767064 has 16 divisors (see below), whose sum is σ = 45567563072400. Its totient is φ = 9113512614432.

The previous prime is 21264862767037. The next prime is 21264862767097. The reversal of 21264862767064 is 46076726846212.

It is a junction number, because it is equal to n+sod(n) for n = 21264862766993 and 21264862767011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189864846079 + ... + 189864846190.

It is an arithmetic number, because the mean of its divisors is an integer number (2847972692025).

Almost surely, 2^{21264862767064} is an apocalyptic number.

It is an amenable number.

21264862767064 is an abundant number, since it is smaller than the sum of its proper divisors (24302700305336).

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

21264862767064 is a wasteful number, since it uses less digits than its factorization.

21264862767064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379729692282 (or 379729692278 counting only the distinct ones).

The product of its (nonzero) digits is 65028096, while the sum is 61.

The spelling of 21264862767064 in words is "twenty-one trillion, two hundred sixty-four billion, eight hundred sixty-two million, seven hundred sixty-seven thousand, sixty-four".