84904396812 has 18 divisors (see below), whose sum is σ = 214619447588. Its totient is φ = 28301465592.

The previous prime is 84904396789. The next prime is 84904396813. The reversal of 84904396812 is 21869340948.

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (84904396813) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1179227698 + ... + 1179227769.

Almost surely, 2^84904396812 is an apocalyptic number.

It is an amenable number.

84904396812 is an abundant number, since it is smaller than the sum of its proper divisors (129715050776).

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

84904396812 is a wasteful number, since it uses less digits than its factorization.

84904396812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2358455477 (or 2358455472 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The spelling of 84904396812 in words is "eighty-four billion, nine hundred four million, three hundred ninety-six thousand, eight hundred twelve".