921679399264 has 36 divisors (see below), whose sum is σ = 1964874603636. Its totient is φ = 425390489472.

The previous prime is 921679399253. The next prime is 921679399351. The reversal of 921679399264 is 462993976129.

It is a self number, because there is not a number n which added to its sum of digits gives 921679399264.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 85209034 + ... + 85219849.

It is an arithmetic number, because the mean of its divisors is an integer number (54579850101).

Almost surely, 2^921679399264 is an apocalyptic number.

It is an amenable number.

921679399264 is an abundant number, since it is smaller than the sum of its proper divisors (1043195204372).

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

921679399264 is a wasteful number, since it uses less digits than its factorization.

921679399264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170428919 (or 170428898 counting only the distinct ones).

The product of its digits is 79361856, while the sum is 67.

The spelling of 921679399264 in words is "nine hundred twenty-one billion, six hundred seventy-nine million, three hundred ninety-nine thousand, two hundred sixty-four".