904978894464 has 80 divisors (see below), whose sum is σ = 2693202556770. Its totient is φ = 301659628032.

The previous prime is 904978894433. The next prime is 904978894499. The reversal of 904978894464 is 464498879409.

904978894464 is a `hidden beast` number, since 9 + 0 + 4 + 9 + 78 + 8 + 94 + 464 = 666.

It can be written as a sum of positive squares in only one way, i.e., 891120896064 + 13857998400 = 943992^2 + 117720^2 .

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 904978894392 and 904978894401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 43632519 + ... + 43653254.

Almost surely, 2^904978894464 is an apocalyptic number.

It is an amenable number.

904978894464 is an abundant number, since it is smaller than the sum of its proper divisors (1788223662306).

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

904978894464 is an equidigital number, since it uses as much as digits as its factorization.

904978894464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87285799 (or 87285778 counting only the distinct ones).

The product of its (nonzero) digits is 501645312, while the sum is 72.

The spelling of 904978894464 in words is "nine hundred four billion, nine hundred seventy-eight million, eight hundred ninety-four thousand, four hundred sixty-four".