25428908539 has 2 divisors, whose sum is σ = 25428908540. Its totient is φ = 25428908538.

The previous prime is 25428908441. The next prime is 25428908587. The reversal of 25428908539 is 93580982452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25428908539 - 2²⁹ = 24892037627 is a prime.

It is a super-2 number, since 2×25428908539² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25428908539.

It is not a weakly prime, because it can be changed into another prime (25428938539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12714454269 + 12714454270.

It is an arithmetic number, because the mean of its divisors is an integer number (12714454270).

Almost surely, 2^25428908539 is an apocalyptic number.

25428908539 is a deficient number, since it is larger than the sum of its proper divisors (1).

25428908539 is an equidigital number, since it uses as much as digits as its factorization.

25428908539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6220800, while the sum is 55.

The spelling of 25428908539 in words is "twenty-five billion, four hundred twenty-eight million, nine hundred eight thousand, five hundred thirty-nine".