321764639916 has 12 divisors (see below), whose sum is σ = 750784159832. Its totient is φ = 107254879968.

The previous prime is 321764639881. The next prime is 321764639923. The reversal of 321764639916 is 619936467123.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13406859985 + ... + 13406860008.

Almost surely, 2^321764639916 is an apocalyptic number.

It is an amenable number.

321764639916 is an abundant number, since it is smaller than the sum of its proper divisors (429019519916).

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

321764639916 is a wasteful number, since it uses less digits than its factorization.

321764639916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26813720000 (or 26813719998 counting only the distinct ones).

The product of its digits is 8817984, while the sum is 57.

The spelling of 321764639916 in words is "three hundred twenty-one billion, seven hundred sixty-four million, six hundred thirty-nine thousand, nine hundred sixteen".