2640630775 has 12 divisors (see below), whose sum is σ = 3286473184. Its totient is φ = 2104704000.

The previous prime is 2640630743. The next prime is 2640630787. The reversal of 2640630775 is 5770360462.

It is not a de Polignac number, because 2640630775 - 2⁵ = 2640630743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 188106 + ... + 201655.

Almost surely, 2^2640630775 is an apocalyptic number.

2640630775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2640630775 is a deficient number, since it is larger than the sum of its proper divisors (645842409).

2640630775 is a wasteful number, since it uses less digits than its factorization.

2640630775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390042 (or 390037 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 40.

The square root of 2640630775 is about 51387.0681689469. The cubic root of 2640630775 is about 1382.1947110300.

The spelling of 2640630775 in words is "two billion, six hundred forty million, six hundred thirty thousand, seven hundred seventy-five".