256164213532 has 24 divisors (see below), whose sum is σ = 472677282000. Its totient is φ = 121136299776.

The previous prime is 256164213521. The next prime is 256164213553. The reversal of 256164213532 is 235312461652.

It is a congruent number.

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, 2796907 + ... + 2887042.

It is an arithmetic number, because the mean of its divisors is an integer number (19694886750).

Almost surely, 2^256164213532 is an apocalyptic number.

It is an amenable number.

256164213532 is a deficient number, since it is larger than the sum of its proper divisors (216513068468).

256164213532 is a wasteful number, since it uses less digits than its factorization.

256164213532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5684565 (or 5684563 counting only the distinct ones).

The product of its digits is 259200, while the sum is 40.

The spelling of 256164213532 in words is "two hundred fifty-six billion, one hundred sixty-four million, two hundred thirteen thousand, five hundred thirty-two".