25028512139 has 2 divisors, whose sum is σ = 25028512140. Its totient is φ = 25028512138.

The previous prime is 25028512087. The next prime is 25028512169. The reversal of 25028512139 is 93121582052.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25028512139 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (25028512169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12514256069 + 12514256070.

It is an arithmetic number, because the mean of its divisors is an integer number (12514256070).

Almost surely, 2^25028512139 is an apocalyptic number.

25028512139 is a deficient number, since it is larger than the sum of its proper divisors (1).

25028512139 is an equidigital number, since it uses as much as digits as its factorization.

25028512139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 38.

The spelling of 25028512139 in words is "twenty-five billion, twenty-eight million, five hundred twelve thousand, one hundred thirty-nine".