990623396684 has 12 divisors (see below), whose sum is σ = 1733687600400. Its totient is φ = 495284082288.

The previous prime is 990623396663. The next prime is 990623396699. The reversal of 990623396684 is 486693326099.

990623396684 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 990623396684.

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, 6823199 + ... + 6966870.

It is an arithmetic number, because the mean of its divisors is an integer number (144473966700).

Almost surely, 2^990623396684 is an apocalyptic number.

It is an amenable number.

990623396684 is a deficient number, since it is larger than the sum of its proper divisors (743064203716).

990623396684 is a wasteful number, since it uses less digits than its factorization.

990623396684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13808032 (or 13808030 counting only the distinct ones).

The product of its (nonzero) digits is 90699264, while the sum is 65.

The spelling of 990623396684 in words is "nine hundred ninety billion, six hundred twenty-three million, three hundred ninety-six thousand, six hundred eighty-four".