15565652279 has 2 divisors, whose sum is σ = 15565652280. Its totient is φ = 15565652278.

The previous prime is 15565652243. The next prime is 15565652281. The reversal of 15565652279 is 97225656551.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15565652279 is a prime.

Together with 15565652281, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15565652279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15565652209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7782826139 + 7782826140.

It is an arithmetic number, because the mean of its divisors is an integer number (7782826140).

Almost surely, 2^15565652279 is an apocalyptic number.

15565652279 is a deficient number, since it is larger than the sum of its proper divisors (1).

15565652279 is an equidigital number, since it uses as much as digits as its factorization.

15565652279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5670000, while the sum is 53.

The spelling of 15565652279 in words is "fifteen billion, five hundred sixty-five million, six hundred fifty-two thousand, two hundred seventy-nine".