2491205976 has 256 divisors, whose sum is σ = 8816256000. Its totient is φ = 634521600.

The previous prime is 2491205917. The next prime is 2491205999. The reversal of 2491205976 is 6795021942.

2491205976 is a `hidden beast` number, since 2 + 49 + 12 + 0 + 597 + 6 = 666.

It is a super-2 number, since 2×2491205976² = 12412214429716225152, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 485826 + ... + 490926.

It is an arithmetic number, because the mean of its divisors is an integer number (34438500).

Almost surely, 2^2491205976 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 2491205976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4408128000).

2491205976 is an abundant number, since it is smaller than the sum of its proper divisors (6325050024).

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

2491205976 is a wasteful number, since it uses less digits than its factorization.

2491205976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5159 (or 5149 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 2491205976 is about 49911.9822888252. The cubic root of 2491205976 is about 1355.6155617837.

The spelling of 2491205976 in words is "two billion, four hundred ninety-one million, two hundred five thousand, nine hundred seventy-six".