11639091957 has 4 divisors (see below), whose sum is σ = 15518789280. Its totient is φ = 7759394636.

The previous prime is 11639091943. The next prime is 11639092001. The reversal of 11639091957 is 75919093611.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11639091957 - 2²² = 11634897653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11639091907) 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, 1939848657 + ... + 1939848662.

It is an arithmetic number, because the mean of its divisors is an integer number (3879697320).

Almost surely, 2^11639091957 is an apocalyptic number.

It is an amenable number.

11639091957 is a deficient number, since it is larger than the sum of its proper divisors (3879697323).

11639091957 is an equidigital number, since it uses as much as digits as its factorization.

11639091957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3879697322.

The product of its (nonzero) digits is 459270, while the sum is 51.

The spelling of 11639091957 in words is "eleven billion, six hundred thirty-nine million, ninety-one thousand, nine hundred fifty-seven".