638564490083 has 12 divisors (see below), whose sum is σ = 691548043248. Its totient is φ = 589371924960.

The previous prime is 638564490061. The next prime is 638564490127. The reversal of 638564490083 is 380094465836.

It is a happy number.

It is not a de Polignac number, because 638564490083 - 2³⁰ = 637490748259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (638564490013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1177241 + ... + 1631877.

It is an arithmetic number, because the mean of its divisors is an integer number (57629003604).

Almost surely, 2^638564490083 is an apocalyptic number.

638564490083 is a deficient number, since it is larger than the sum of its proper divisors (52983553165).

638564490083 is a wasteful number, since it uses less digits than its factorization.

638564490083 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462974 (or 462961 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 56.

The spelling of 638564490083 in words is "six hundred thirty-eight billion, five hundred sixty-four million, four hundred ninety thousand, eighty-three".