2499491656 has 16 divisors (see below), whose sum is σ = 4706664300. Its totient is φ = 1244381184.

The previous prime is 2499491639. The next prime is 2499491663. The reversal of 2499491656 is 6561949942.

It can be written as a sum of positive squares in 2 ways, for example, as 2159089156 + 340402500 = 46466^2 + 18450^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2499491597 and 2499491606.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 668601 + ... + 672328.

Almost surely, 2^2499491656 is an apocalyptic number.

It is an amenable number.

2499491656 is a deficient number, since it is larger than the sum of its proper divisors (2207172644).

2499491656 is a wasteful number, since it uses less digits than its factorization.

2499491656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1341168 (or 1341164 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 55.

The square root of 2499491656 is about 49994.9163015601. The cubic root of 2499491656 is about 1357.1168115344.

The spelling of 2499491656 in words is "two billion, four hundred ninety-nine million, four hundred ninety-one thousand, six hundred fifty-six".