2499318657 has 24 divisors (see below), whose sum is σ = 4002892608. Its totient is φ = 1489903200.

The previous prime is 2499318649. The next prime is 2499318683. The reversal of 2499318657 is 7568139942.

It is not a de Polignac number, because 2499318657 - 2³ = 2499318649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2499318607) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 200893 + ... + 212970.

It is an arithmetic number, because the mean of its divisors is an integer number (166787192).

Almost surely, 2^2499318657 is an apocalyptic number.

It is an amenable number.

2499318657 is a deficient number, since it is larger than the sum of its proper divisors (1503573951).

2499318657 is a wasteful number, since it uses less digits than its factorization.

2499318657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413941 (or 413938 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 2499318657 is about 49993.1861057084. The cubic root of 2499318657 is about 1357.0855004653.

The spelling of 2499318657 in words is "two billion, four hundred ninety-nine million, three hundred eighteen thousand, six hundred fifty-seven".