2499644656 has 10 divisors (see below), whose sum is σ = 4843061552. Its totient is φ = 1249822320.

The previous prime is 2499644633. The next prime is 2499644659. The reversal of 2499644656 is 6564469942.

It is a junction number, because it is equal to n+sod(n) for n = 2499644597 and 2499644606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2499644659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78113880 + ... + 78113911.

Almost surely, 2^2499644656 is an apocalyptic number.

It is an amenable number.

2499644656 is a deficient number, since it is larger than the sum of its proper divisors (2343416896).

2499644656 is a wasteful number, since it uses less digits than its factorization.

2499644656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156227799 (or 156227793 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 55.

The square root of 2499644656 is about 49996.4464337217. The cubic root of 2499644656 is about 1357.1445017830.

The spelling of 2499644656 in words is "two billion, four hundred ninety-nine million, six hundred forty-four thousand, six hundred fifty-six".