11971274772 has 24 divisors (see below), whose sum is σ = 27999335392. Its totient is φ = 3980944800.

The previous prime is 11971274771. The next prime is 11971274789. The reversal of 11971274772 is 27747217911.

It is a super-2 number, since 2×11971274772² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11971274771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1179754 + ... + 1189857.

Almost surely, 2^11971274772 is an apocalyptic number.

11971274772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11971274772 is an abundant number, since it is smaller than the sum of its proper divisors (16028060620).

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

11971274772 is a wasteful number, since it uses less digits than its factorization.

11971274772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2370039 (or 2370037 counting only the distinct ones).

The product of its digits is 345744, while the sum is 48.

The spelling of 11971274772 in words is "eleven billion, nine hundred seventy-one million, two hundred seventy-four thousand, seven hundred seventy-two".