2640002647 has 2 divisors, whose sum is σ = 2640002648. Its totient is φ = 2640002646.

The previous prime is 2640002621. The next prime is 2640002657. The reversal of 2640002647 is 7462000462.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2640002647 - 2¹¹ = 2640000599 is a prime.

It is a super-2 number, since 2×2640002647² = 13939227952334013218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2640002657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320001323 + 1320001324.

It is an arithmetic number, because the mean of its divisors is an integer number (1320001324).

Almost surely, 2^2640002647 is an apocalyptic number.

2640002647 is a deficient number, since it is larger than the sum of its proper divisors (1).

2640002647 is an equidigital number, since it uses as much as digits as its factorization.

2640002647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 2640002647 is about 51380.9560732379. The cubic root of 2640002647 is about 1382.0851079185.

The spelling of 2640002647 in words is "two billion, six hundred forty million, two thousand, six hundred forty-seven".