2640430571 has 2 divisors, whose sum is σ = 2640430572. Its totient is φ = 2640430570.

The previous prime is 2640430489. The next prime is 2640430591. The reversal of 2640430571 is 1750340462.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2640430571 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2640430591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320215285 + 1320215286.

It is an arithmetic number, because the mean of its divisors is an integer number (1320215286).

Almost surely, 2^2640430571 is an apocalyptic number.

2640430571 is a deficient number, since it is larger than the sum of its proper divisors (1).

2640430571 is an equidigital number, since it uses as much as digits as its factorization.

2640430571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 2640430571 is about 51385.1201321939. The cubic root of 2640430571 is about 1382.1597789845.

The spelling of 2640430571 in words is "two billion, six hundred forty million, four hundred thirty thousand, five hundred seventy-one".