2640642597 has 12 divisors (see below), whose sum is σ = 3907292844. Its totient is φ = 1717490880.

The previous prime is 2640642583. The next prime is 2640642637. The reversal of 2640642597 is 7952460462.

It can be written as a sum of positive squares in 2 ways, for example, as 583657281 + 2056985316 = 24159^2 + 45354^2 .

It is not a de Polignac number, because 2640642597 - 2⁶ = 2640642533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640642497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3577738 + ... + 3578475.

It is an arithmetic number, because the mean of its divisors is an integer number (325607737).

Almost surely, 2^2640642597 is an apocalyptic number.

It is an amenable number.

2640642597 is a deficient number, since it is larger than the sum of its proper divisors (1266650247).

2640642597 is a wasteful number, since it uses less digits than its factorization.

2640642597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7156260 (or 7156257 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The square root of 2640642597 is about 51387.1831977586. The cubic root of 2640642597 is about 1382.1967737040.

The spelling of 2640642597 in words is "two billion, six hundred forty million, six hundred forty-two thousand, five hundred ninety-seven".