11517473972 has 12 divisors (see below), whose sum is σ = 20157784836. Its totient is φ = 5758106880.

The previous prime is 11517473969. The next prime is 11517474013. The reversal of 11517473972 is 27937471511.

It can be written as a sum of positive squares in 2 ways, for example, as 7688834596 + 3828639376 = 87686^2 + 61876^2 .

It is a congruent number.

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, 115133 + ... + 190500.

It is an arithmetic number, because the mean of its divisors is an integer number (1679815403).

Almost surely, 2^11517473972 is an apocalyptic number.

It is an amenable number.

11517473972 is a deficient number, since it is larger than the sum of its proper divisors (8640310864).

11517473972 is a wasteful number, since it uses less digits than its factorization.

11517473972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315058 (or 315056 counting only the distinct ones).

The product of its digits is 370440, while the sum is 47.

The spelling of 11517473972 in words is "eleven billion, five hundred seventeen million, four hundred seventy-three thousand, nine hundred seventy-two".