25613835473 has 2 divisors, whose sum is σ = 25613835474. Its totient is φ = 25613835472.

The previous prime is 25613835439. The next prime is 25613835479. The reversal of 25613835473 is 37453831652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24375640129 + 1238195344 = 156127^2 + 35188^2 .

It is a cyclic number.

It is not a de Polignac number, because 25613835473 - 2⁶ = 25613835409 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (25613835479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12806917736 + 12806917737.

It is an arithmetic number, because the mean of its divisors is an integer number (12806917737).

Almost surely, 2^25613835473 is an apocalyptic number.

It is an amenable number.

25613835473 is a deficient number, since it is larger than the sum of its proper divisors (1).

25613835473 is an equidigital number, since it uses as much as digits as its factorization.

25613835473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1814400, while the sum is 47.

The spelling of 25613835473 in words is "twenty-five billion, six hundred thirteen million, eight hundred thirty-five thousand, four hundred seventy-three".