11765722818 has 48 divisors (see below), whose sum is σ = 24787689696. Its totient is φ = 3722621760.

The previous prime is 11765722789. The next prime is 11765722873. The reversal of 11765722818 is 81822756711.

It is a super-2 number, since 2×11765722818² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 401646 + ... + 429942.

It is an arithmetic number, because the mean of its divisors is an integer number (516410202).

Almost surely, 2^11765722818 is an apocalyptic number.

11765722818 is an abundant number, since it is smaller than the sum of its proper divisors (13021966878).

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

11765722818 is a wasteful number, since it uses less digits than its factorization.

11765722818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28479 (or 28456 counting only the distinct ones).

The product of its digits is 376320, while the sum is 48.

The spelling of 11765722818 in words is "eleven billion, seven hundred sixty-five million, seven hundred twenty-two thousand, eight hundred eighteen".