2491515136 has 72 divisors (see below), whose sum is σ = 5600625408. Its totient is φ = 1095936000.

The previous prime is 2491515119. The next prime is 2491515151. The reversal of 2491515136 is 6315151942.

It is a junction number, because it is equal to n+sod(n) for n = 2491515095 and 2491515104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73026 + ... + 101566.

It is an arithmetic number, because the mean of its divisors is an integer number (77786464).

Almost surely, 2^2491515136 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 2491515136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2800312704).

2491515136 is an abundant number, since it is smaller than the sum of its proper divisors (3109110272).

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

2491515136 is a wasteful number, since it uses less digits than its factorization.

2491515136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28599 (or 28585 counting only the distinct ones).

The product of its digits is 32400, while the sum is 37.

The square root of 2491515136 is about 49915.0792446531. The cubic root of 2491515136 is about 1355.6716370040.

The spelling of 2491515136 in words is "two billion, four hundred ninety-one million, five hundred fifteen thousand, one hundred thirty-six".