11639091956 has 12 divisors (see below), whose sum is σ = 21566552868. Its totient is φ = 5477219712.

The previous prime is 11639091943. The next prime is 11639092001. The reversal of 11639091956 is 65919093611.

It can be written as a sum of positive squares in 2 ways, for example, as 7165622500 + 4473469456 = 84650^2 + 66884^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85581491 + ... + 85581626.

It is an arithmetic number, because the mean of its divisors is an integer number (1797212739).

Almost surely, 2^11639091956 is an apocalyptic number.

It is an amenable number.

11639091956 is a deficient number, since it is larger than the sum of its proper divisors (9927460912).

11639091956 is a wasteful number, since it uses less digits than its factorization.

11639091956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171163138 (or 171163136 counting only the distinct ones).

The product of its (nonzero) digits is 393660, while the sum is 50.

The spelling of 11639091956 in words is "eleven billion, six hundred thirty-nine million, ninety-one thousand, nine hundred fifty-six".