10638517808 has 20 divisors (see below), whose sum is σ = 20614837560. Its totient is φ = 5318559744.

The previous prime is 10638517807. The next prime is 10638517811. The reversal of 10638517808 is 80871583601.

It is a happy number.

It is a super-2 number, since 2×10638517808² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10638517801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95216 + ... + 174192.

It is an arithmetic number, because the mean of its divisors is an integer number (1030741878).

Almost surely, 2^10638517808 is an apocalyptic number.

It is an amenable number.

10638517808 is a deficient number, since it is larger than the sum of its proper divisors (9976319752).

10638517808 is an equidigital number, since it uses as much as digits as its factorization.

10638517808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87404 (or 87398 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 47.

The spelling of 10638517808 in words is "ten billion, six hundred thirty-eight million, five hundred seventeen thousand, eight hundred eight".