83894437657904 has 20 divisors (see below), whose sum is σ = 168150489272160. Its totient is φ = 40500763007040.

The previous prime is 83894437657897. The next prime is 83894437657937. The reversal of 83894437657904 is 40975673449838.

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, 90403488392 + ... + 90403489319.

It is an arithmetic number, because the mean of its divisors is an integer number (8407524463608).

Almost surely, 2^{83894437657904} is an apocalyptic number.

It is an amenable number.

83894437657904 is an abundant number, since it is smaller than the sum of its proper divisors (84256051614256).

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

83894437657904 is a wasteful number, since it uses less digits than its factorization.

83894437657904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180806977748 (or 180806977742 counting only the distinct ones).

The product of its (nonzero) digits is 4389396480, while the sum is 77.

The spelling of 83894437657904 in words is "eighty-three trillion, eight hundred ninety-four billion, four hundred thirty-seven million, six hundred fifty-seven thousand, nine hundred four".