17138561808 has 40 divisors (see below), whose sum is σ = 44680820800. Its totient is φ = 5660440704.

The previous prime is 17138561807. The next prime is 17138561821. The reversal of 17138561808 is 80816583171.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (17138561807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1632628 + ... + 1643091.

It is an arithmetic number, because the mean of its divisors is an integer number (1117020520).

Almost surely, 2^17138561808 is an apocalyptic number.

It is an amenable number.

17138561808 is an abundant number, since it is smaller than the sum of its proper divisors (27542258992).

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

17138561808 is a wasteful number, since it uses less digits than its factorization.

17138561808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3275839 (or 3275833 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 48.

The spelling of 17138561808 in words is "seventeen billion, one hundred thirty-eight million, five hundred sixty-one thousand, eight hundred eight".