25299539971 has 2 divisors, whose sum is σ = 25299539972. Its totient is φ = 25299539970.

The previous prime is 25299539897. The next prime is 25299540031. The reversal of 25299539971 is 17993599252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25299539971 - 2²⁷ = 25165322243 is a prime.

It is not a weakly prime, because it can be changed into another prime (25299536971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12649769985 + 12649769986.

It is an arithmetic number, because the mean of its divisors is an integer number (12649769986).

Almost surely, 2^25299539971 is an apocalyptic number.

25299539971 is a deficient number, since it is larger than the sum of its proper divisors (1).

25299539971 is an equidigital number, since it uses as much as digits as its factorization.

25299539971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13778100, while the sum is 61.

The spelling of 25299539971 in words is "twenty-five billion, two hundred ninety-nine million, five hundred thirty-nine thousand, nine hundred seventy-one".