25391996933 has 2 divisors, whose sum is σ = 25391996934. Its totient is φ = 25391996932.

The previous prime is 25391996923. The next prime is 25391996947. The reversal of 25391996933 is 33969919352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25326176164 + 65820769 = 159142^2 + 8113^2 .

It is a cyclic number.

It is not a de Polignac number, because 25391996933 - 2⁶ = 25391996869 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25391996923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12695998466 + 12695998467.

It is an arithmetic number, because the mean of its divisors is an integer number (12695998467).

Almost surely, 2^25391996933 is an apocalyptic number.

It is an amenable number.

25391996933 is a deficient number, since it is larger than the sum of its proper divisors (1).

25391996933 is an equidigital number, since it uses as much as digits as its factorization.

25391996933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10628820, while the sum is 59.

The spelling of 25391996933 in words is "twenty-five billion, three hundred ninety-one million, nine hundred ninety-six thousand, nine hundred thirty-three".