2815645279 has 2 divisors, whose sum is σ = 2815645280. Its totient is φ = 2815645278.

The previous prime is 2815645253. The next prime is 2815645291. The reversal of 2815645279 is 9725465182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2815645279 - 2²⁵ = 2782090847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2815645249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1407822639 + 1407822640.

It is an arithmetic number, because the mean of its divisors is an integer number (1407822640).

Almost surely, 2^2815645279 is an apocalyptic number.

2815645279 is a deficient number, since it is larger than the sum of its proper divisors (1).

2815645279 is an equidigital number, since it uses as much as digits as its factorization.

2815645279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1209600, while the sum is 49.

The square root of 2815645279 is about 53062.6542777498. The cubic root of 2815645279 is about 1412.0800376684.

The spelling of 2815645279 in words is "two billion, eight hundred fifteen million, six hundred forty-five thousand, two hundred seventy-nine".