18165792712 has 8 divisors (see below), whose sum is σ = 34060861350. Its totient is φ = 9082896352.

The previous prime is 18165792691. The next prime is 18165792769. The reversal of 18165792712 is 21729756181.

It can be written as a sum of positive squares in only one way, i.e., 14345811076 + 3819981636 = 119774^2 + 61806^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1135362037 + ... + 1135362052.

Almost surely, 2^18165792712 is an apocalyptic number.

It is an amenable number.

18165792712 is a deficient number, since it is larger than the sum of its proper divisors (15895068638).

18165792712 is a wasteful number, since it uses less digits than its factorization.

18165792712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2270724095 (or 2270724091 counting only the distinct ones).

The product of its digits is 423360, while the sum is 49.

The spelling of 18165792712 in words is "eighteen billion, one hundred sixty-five million, seven hundred ninety-two thousand, seven hundred twelve".