11659988138 has 32 divisors (see below), whose sum is σ = 18664266240. Its totient is φ = 5450389120.

The previous prime is 11659988117. The next prime is 11659988147. The reversal of 11659988138 is 83188995611.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1771718 + ... + 1778286.

It is an arithmetic number, because the mean of its divisors is an integer number (583258320).

Almost surely, 2^11659988138 is an apocalyptic number.

11659988138 is a deficient number, since it is larger than the sum of its proper divisors (7004278102).

11659988138 is a wasteful number, since it uses less digits than its factorization.

11659988138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7462.

The product of its digits is 3732480, while the sum is 59.

The spelling of 11659988138 in words is "eleven billion, six hundred fifty-nine million, nine hundred eighty-eight thousand, one hundred thirty-eight".