264644068556 has 24 divisors (see below), whose sum is σ = 529432995840. Its totient is φ = 113387845392.

The previous prime is 264644068543. The next prime is 264644068597. The reversal of 264644068556 is 655860446462.

It is a happy number.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1189100 + ... + 1394003.

It is an arithmetic number, because the mean of its divisors is an integer number (22059708160).

Almost surely, 2^264644068556 is an apocalyptic number.

It is an amenable number.

264644068556 is an abundant number, since it is smaller than the sum of its proper divisors (264788927284).

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

264644068556 is a wasteful number, since it uses less digits than its factorization.

264644068556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2586773 (or 2586771 counting only the distinct ones).

The product of its (nonzero) digits is 33177600, while the sum is 56.

The spelling of 264644068556 in words is "two hundred sixty-four billion, six hundred forty-four million, sixty-eight thousand, five hundred fifty-six".