25002405979 has 2 divisors, whose sum is σ = 25002405980. Its totient is φ = 25002405978.

The previous prime is 25002405949. The next prime is 25002405983. The reversal of 25002405979 is 97950420052.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25002405979 is a prime.

It is not a weakly prime, because it can be changed into another prime (25002405949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12501202989 + 12501202990.

It is an arithmetic number, because the mean of its divisors is an integer number (12501202990).

Almost surely, 2^25002405979 is an apocalyptic number.

25002405979 is a deficient number, since it is larger than the sum of its proper divisors (1).

25002405979 is an equidigital number, since it uses as much as digits as its factorization.

25002405979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 25002405979 in words is "twenty-five billion, two million, four hundred five thousand, nine hundred seventy-nine".