264340680581656 has 16 divisors (see below), whose sum is σ = 566444315532240. Its totient is φ = 113288863106400.

The previous prime is 264340680581599. The next prime is 264340680581701. The reversal of 264340680581656 is 656185086043462.

It is a happy number.

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, 2360184647995 + ... + 2360184648106.

It is an arithmetic number, because the mean of its divisors is an integer number (35402769720765).

Almost surely, 2^{264340680581656} is an apocalyptic number.

It is an amenable number.

264340680581656 is an abundant number, since it is smaller than the sum of its proper divisors (302103634950584).

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

264340680581656 is a wasteful number, since it uses less digits than its factorization.

264340680581656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4720369296114 (or 4720369296110 counting only the distinct ones).

The product of its (nonzero) digits is 199065600, while the sum is 64.

The spelling of 264340680581656 in words is "two hundred sixty-four trillion, three hundred forty billion, six hundred eighty million, five hundred eighty-one thousand, six hundred fifty-six".