11775771472 has 20 divisors (see below), whose sum is σ = 23807538720. Its totient is φ = 5631890528.

The previous prime is 11775771467. The next prime is 11775771479. The reversal of 11775771472 is 27417757711.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11775771479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15999322 + ... + 16000057.

It is an arithmetic number, because the mean of its divisors is an integer number (1190376936).

Almost surely, 2^11775771472 is an apocalyptic number.

It is an amenable number.

11775771472 is an abundant number, since it is smaller than the sum of its proper divisors (12031767248).

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

11775771472 is a wasteful number, since it uses less digits than its factorization.

11775771472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31999410 (or 31999404 counting only the distinct ones).

The product of its digits is 672280, while the sum is 49.

The spelling of 11775771472 in words is "eleven billion, seven hundred seventy-five million, seven hundred seventy-one thousand, four hundred seventy-two".