11971765472 has 12 divisors (see below), whose sum is σ = 23569413336. Its totient is φ = 5985882720.

The previous prime is 11971765457. The next prime is 11971765567. The reversal of 11971765472 is 27456717911.

It is a self number, because there is not a number n which added to its sum of digits gives 11971765472.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 187058804 + ... + 187058867.

It is an arithmetic number, because the mean of its divisors is an integer number (1964117778).

Almost surely, 2^11971765472 is an apocalyptic number.

It is an amenable number.

11971765472 is a deficient number, since it is larger than the sum of its proper divisors (11597647864).

11971765472 is an equidigital number, since it uses as much as digits as its factorization.

11971765472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374117681 (or 374117673 counting only the distinct ones).

The product of its digits is 740880, while the sum is 50.

The spelling of 11971765472 in words is "eleven billion, nine hundred seventy-one million, seven hundred sixty-five thousand, four hundred seventy-two".