2643392872 has 8 divisors (see below), whose sum is σ = 4956361650. Its totient is φ = 1321696432.

The previous prime is 2643392797. The next prime is 2643392893. The reversal of 2643392872 is 2782933462.

It can be written as a sum of positive squares in only one way, i.e., 2552876676 + 90516196 = 50526^2 + 9514^2 .

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, 165212047 + ... + 165212062.

Almost surely, 2^2643392872 is an apocalyptic number.

It is an amenable number.

2643392872 is a deficient number, since it is larger than the sum of its proper divisors (2312968778).

2643392872 is a wasteful number, since it uses less digits than its factorization.

2643392872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330424115 (or 330424111 counting only the distinct ones).

The product of its digits is 870912, while the sum is 46.

The square root of 2643392872 is about 51413.9365542068. The cubic root of 2643392872 is about 1382.6764678323.

The spelling of 2643392872 in words is "two billion, six hundred forty-three million, three hundred ninety-two thousand, eight hundred seventy-two".