90621388604 has 24 divisors (see below), whose sum is σ = 159753919920. Its totient is φ = 44977516416.

The previous prime is 90621388567. The next prime is 90621388609. The reversal of 90621388604 is 40688312609.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90621388609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5750624 + ... + 5766360.

It is an arithmetic number, because the mean of its divisors is an integer number (6656413330).

Almost surely, 2^90621388604 is an apocalyptic number.

It is an amenable number.

90621388604 is a deficient number, since it is larger than the sum of its proper divisors (69132531316).

90621388604 is a wasteful number, since it uses less digits than its factorization.

90621388604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26237 (or 26235 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 47.

The spelling of 90621388604 in words is "ninety billion, six hundred twenty-one million, three hundred eighty-eight thousand, six hundred four".