11971274768 has 20 divisors (see below), whose sum is σ = 23196340860. Its totient is φ = 5985122304.

The previous prime is 11971274747. The next prime is 11971274771. The reversal of 11971274768 is 86747217911.

It can be written as a sum of positive squares in 2 ways, for example, as 9286791424 + 2684483344 = 96368^2 + 51812^2 .

It is a super-2 number, since 2×11971274768² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (53) 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 3 ways as a sum of consecutive naturals, for example, 218888 + ... + 268056.

It is an arithmetic number, because the mean of its divisors is an integer number (1159817043).

Almost surely, 2^11971274768 is an apocalyptic number.

It is an amenable number.

11971274768 is a deficient number, since it is larger than the sum of its proper divisors (11225066092).

11971274768 is a wasteful number, since it uses less digits than its factorization.

11971274768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64394 (or 64388 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 53.

The spelling of 11971274768 in words is "eleven billion, nine hundred seventy-one million, two hundred seventy-four thousand, seven hundred sixty-eight".