25566122587 has 2 divisors, whose sum is σ = 25566122588. Its totient is φ = 25566122586.

The previous prime is 25566122567. The next prime is 25566122599. The reversal of 25566122587 is 78522166552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25566122587 - 2¹¹ = 25566120539 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25566122587.

It is not a weakly prime, because it can be changed into another prime (25566122567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12783061293 + 12783061294.

It is an arithmetic number, because the mean of its divisors is an integer number (12783061294).

Almost surely, 2^25566122587 is an apocalyptic number.

25566122587 is a deficient number, since it is larger than the sum of its proper divisors (1).

25566122587 is an equidigital number, since it uses as much as digits as its factorization.

25566122587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016000, while the sum is 49.

The spelling of 25566122587 in words is "twenty-five billion, five hundred sixty-six million, one hundred twenty-two thousand, five hundred eighty-seven".