11996563761 has 48 divisors (see below), whose sum is σ = 21903691264. Its totient is φ = 6156819072.

The previous prime is 11996563741. The next prime is 11996563763. The reversal of 11996563761 is 16736569911.

It is a happy number.

11996563761 is a `hidden beast` number, since 1 + 1 + 9 + 9 + 6 + 563 + 76 + 1 = 666.

It is not a de Polignac number, because 11996563761 - 2¹³ = 11996555569 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11996563698 and 11996563707.

It is not an unprimeable number, because it can be changed into a prime (11996563763) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 167641 + ... + 228246.

Almost surely, 2^11996563761 is an apocalyptic number.

It is an amenable number.

11996563761 is a deficient number, since it is larger than the sum of its proper divisors (9907127503).

11996563761 is a wasteful number, since it uses less digits than its factorization.

11996563761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395950 (or 395947 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 54.

The spelling of 11996563761 in words is "eleven billion, nine hundred ninety-six million, five hundred sixty-three thousand, seven hundred sixty-one".