2649794257 has 16 divisors (see below), whose sum is σ = 2972204352. Its totient is φ = 2341120320.

The previous prime is 2649794249. The next prime is 2649794261. The reversal of 2649794257 is 7524979462.

It is not a de Polignac number, because 2649794257 - 2³ = 2649794249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2649794198 and 2649794207.

It is not an unprimeable number, because it can be changed into a prime (2649794227) 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 in 15 ways as a sum of consecutive naturals, for example, 409078 + ... + 415504.

It is an arithmetic number, because the mean of its divisors is an integer number (185762772).

Almost surely, 2^2649794257 is an apocalyptic number.

It is an amenable number.

2649794257 is a deficient number, since it is larger than the sum of its proper divisors (322410095).

2649794257 is a wasteful number, since it uses less digits than its factorization.

2649794257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7488.

The product of its digits is 7620480, while the sum is 55.

The square root of 2649794257 is about 51476.1523134742. The cubic root of 2649794257 is about 1383.7916897840.

The spelling of 2649794257 in words is "two billion, six hundred forty-nine million, seven hundred ninety-four thousand, two hundred fifty-seven".