2564791918 has 8 divisors (see below), whose sum is σ = 4143125448. Its totient is φ = 1183750104.

The previous prime is 2564791903. The next prime is 2564791963. The reversal of 2564791918 is 8191974652.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 49322896 + ... + 49322947.

It is an arithmetic number, because the mean of its divisors is an integer number (517890681).

Almost surely, 2^2564791918 is an apocalyptic number.

2564791918 is a deficient number, since it is larger than the sum of its proper divisors (1578333530).

2564791918 is a wasteful number, since it uses less digits than its factorization.

2564791918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98645858.

The product of its digits is 1088640, while the sum is 52.

The square root of 2564791918 is about 50643.7747210849. The cubic root of 2564791918 is about 1368.8337737123.

The spelling of 2564791918 in words is "two billion, five hundred sixty-four million, seven hundred ninety-one thousand, nine hundred eighteen".