2499620864 has 156 divisors (see below), whose sum is σ = 5684029776. Its totient is φ = 1096482816.

The previous prime is 2499620843. The next prime is 2499620873. The reversal of 2499620864 is 4680269942.

It is a happy number.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15921074 + ... + 15921230.

Almost surely, 2^2499620864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2499620864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2842014888).

2499620864 is an abundant number, since it is smaller than the sum of its proper divisors (3184408912).

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

2499620864 is a wasteful number, since it uses less digits than its factorization.

2499620864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 50.

The square root of 2499620864 is about 49996.2084962450. The cubic root of 2499620864 is about 1357.1401959330.

The spelling of 2499620864 in words is "two billion, four hundred ninety-nine million, six hundred twenty thousand, eight hundred sixty-four".