2640955917 has 16 divisors (see below), whose sum is σ = 3557882880. Its totient is φ = 1742367792.

The previous prime is 2640955907. The next prime is 2640955957. The reversal of 2640955917 is 7195590462.

2640955917 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2640955917 - 2¹² = 2640951821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640955907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 350334 + ... + 357792.

It is an arithmetic number, because the mean of its divisors is an integer number (222367680).

Almost surely, 2^2640955917 is an apocalyptic number.

It is an amenable number.

2640955917 is a deficient number, since it is larger than the sum of its proper divisors (916926963).

2640955917 is a wasteful number, since it uses less digits than its factorization.

2640955917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8672.

The product of its (nonzero) digits is 680400, while the sum is 48.

The square root of 2640955917 is about 51390.2317274402. The cubic root of 2640955917 is about 1382.2514387777.

The spelling of 2640955917 in words is "two billion, six hundred forty million, nine hundred fifty-five thousand, nine hundred seventeen".