11993765816 has 8 divisors (see below), whose sum is σ = 22488310920. Its totient is φ = 5996882904.

The previous prime is 11993765813. The next prime is 11993765869. The reversal of 11993765816 is 61856739911.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11993765813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 749610356 + ... + 749610371.

It is an arithmetic number, because the mean of its divisors is an integer number (2811038865).

Almost surely, 2^11993765816 is an apocalyptic number.

It is an amenable number.

11993765816 is a deficient number, since it is larger than the sum of its proper divisors (10494545104).

11993765816 is a wasteful number, since it uses less digits than its factorization.

11993765816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1499220733 (or 1499220729 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 56.

The spelling of 11993765816 in words is "eleven billion, nine hundred ninety-three million, seven hundred sixty-five thousand, eight hundred sixteen".