2159994574864 has 45 divisors (see below), whose sum is σ = 4868345828637. Its totient is φ = 925694324352.

The previous prime is 2159994574831. The next prime is 2159994574873. The reversal of 2159994574864 is 4684754999512.

The square root of 2159994574864 is 1469692.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 353658574864 + 1806336000000 = 594692^2 + 1344000^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 41125132 + ... + 41177620.

Almost surely, 2^{2159994574864} is an apocalyptic number.

2159994574864 is the 1469692-nd square number.

It is an amenable number.

2159994574864 is an abundant number, since it is smaller than the sum of its proper divisors (2708351253773).

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

2159994574864 is an frugal number, since it uses more digits than its factorization.

2159994574864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105000 (or 52498 counting only the distinct ones).

The product of its digits is 783820800, while the sum is 73.

The spelling of 2159994574864 in words is "two trillion, one hundred fifty-nine billion, nine hundred ninety-four million, five hundred seventy-four thousand, eight hundred sixty-four".