2181159764992 has 88 divisors (see below), whose sum is σ = 4942725502400. Its totient is φ = 953705373696.

The previous prime is 2181159764983. The next prime is 2181159765017. The reversal of 2181159764992 is 2994679511812.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4058892 + ... + 4564747.

Almost surely, 2^{2181159764992} is an apocalyptic number.

It is an amenable number.

2181159764992 is an abundant number, since it is smaller than the sum of its proper divisors (2761565737408).

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

2181159764992 is a wasteful number, since it uses less digits than its factorization.

2181159764992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8623691 (or 8623673 counting only the distinct ones).

The product of its digits is 19595520, while the sum is 64.

The spelling of 2181159764992 in words is "two trillion, one hundred eighty-one billion, one hundred fifty-nine million, seven hundred sixty-four thousand, nine hundred ninety-two".