321878083100856 has 64 divisors (see below), whose sum is σ = 811821172273920. Its totient is φ = 106342576919040.

The previous prime is 321878083100809. The next prime is 321878083100867. The reversal of 321878083100856 is 658001380878123.

It is a self number, because there is not a number n which added to its sum of digits gives 321878083100856.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 801745851 + ... + 802147221.

It is an arithmetic number, because the mean of its divisors is an integer number (12684705816780).

Almost surely, 2^{321878083100856} is an apocalyptic number.

It is an amenable number.

321878083100856 is an abundant number, since it is smaller than the sum of its proper divisors (489943089173064).

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

321878083100856 is a wasteful number, since it uses less digits than its factorization.

321878083100856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697196 (or 697192 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 60.

The spelling of 321878083100856 in words is "three hundred twenty-one trillion, eight hundred seventy-eight billion, eighty-three million, one hundred thousand, eight hundred fifty-six".