11691990676 has 12 divisors (see below), whose sum is σ = 21013983508. Its totient is φ = 5687995392.

The previous prime is 11691990649. The next prime is 11691990691. The reversal of 11691990676 is 67609919611.

It can be written as a sum of positive squares in 2 ways, for example, as 10624661776 + 1067328900 = 103076^2 + 32670^2 .

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, 39499821 + ... + 39500116.

Almost surely, 2^11691990676 is an apocalyptic number.

It is an amenable number.

11691990676 is a deficient number, since it is larger than the sum of its proper divisors (9321992832).

11691990676 is a wasteful number, since it uses less digits than its factorization.

11691990676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78999978 (or 78999976 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 55.

The spelling of 11691990676 in words is "eleven billion, six hundred ninety-one million, nine hundred ninety thousand, six hundred seventy-six".