25107975973 has 2 divisors, whose sum is σ = 25107975974. Its totient is φ = 25107975972.

The previous prime is 25107975947. The next prime is 25107976001. The reversal of 25107975973 is 37957970152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21101339169 + 4006636804 = 145263^2 + 63298^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25107975973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25107972973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12553987986 + 12553987987.

It is an arithmetic number, because the mean of its divisors is an integer number (12553987987).

Almost surely, 2^25107975973 is an apocalyptic number.

It is an amenable number.

25107975973 is a deficient number, since it is larger than the sum of its proper divisors (1).

25107975973 is an equidigital number, since it uses as much as digits as its factorization.

25107975973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4167450, while the sum is 55.

The spelling of 25107975973 in words is "twenty-five billion, one hundred seven million, nine hundred seventy-five thousand, nine hundred seventy-three".