25137964417 has 2 divisors, whose sum is σ = 25137964418. Its totient is φ = 25137964416.

The previous prime is 25137964381. The next prime is 25137964441. The reversal of 25137964417 is 71446973152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22485302401 + 2652662016 = 149951^2 + 51504^2 .

It is a cyclic number.

It is not a de Polignac number, because 25137964417 - 2²⁷ = 25003746689 is a prime.

It is not a weakly prime, because it can be changed into another prime (25137964487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12568982208 + 12568982209.

It is an arithmetic number, because the mean of its divisors is an integer number (12568982209).

Almost surely, 2^25137964417 is an apocalyptic number.

It is an amenable number.

25137964417 is a deficient number, since it is larger than the sum of its proper divisors (1).

25137964417 is an equidigital number, since it uses as much as digits as its factorization.

25137964417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 49.

The spelling of 25137964417 in words is "twenty-five billion, one hundred thirty-seven million, nine hundred sixty-four thousand, four hundred seventeen".