11975577756 has 12 divisors (see below), whose sum is σ = 27943014792. Its totient is φ = 3991859248.

The previous prime is 11975577737. The next prime is 11975577763. The reversal of 11975577756 is 65777557911.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 11975577756.

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, 498982395 + ... + 498982418.

It is an arithmetic number, because the mean of its divisors is an integer number (2328584566).

Almost surely, 2^11975577756 is an apocalyptic number.

It is an amenable number.

11975577756 is an abundant number, since it is smaller than the sum of its proper divisors (15967437036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11975577756 is a wasteful number, since it uses less digits than its factorization.

11975577756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997964820 (or 997964818 counting only the distinct ones).

The product of its digits is 16206750, while the sum is 60.

The spelling of 11975577756 in words is "eleven billion, nine hundred seventy-five million, five hundred seventy-seven thousand, seven hundred fifty-six".