819675540920 has 32 divisors (see below), whose sum is σ = 1847936553120. Its totient is φ = 327218378880.

The previous prime is 819675540877. The next prime is 819675540979. The reversal of 819675540920 is 29045576918.

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, 20349551 + ... + 20389790.

It is an arithmetic number, because the mean of its divisors is an integer number (57748017285).

Almost surely, 2^819675540920 is an apocalyptic number.

It is an amenable number.

819675540920 is an abundant number, since it is smaller than the sum of its proper divisors (1028261012200).

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

819675540920 is a wasteful number, since it uses less digits than its factorization.

819675540920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40739855 (or 40739851 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 56.

The spelling of 819675540920 in words is "eight hundred nineteen billion, six hundred seventy-five million, five hundred forty thousand, nine hundred twenty".