25990107457 has 2 divisors, whose sum is σ = 25990107458. Its totient is φ = 25990107456.

The previous prime is 25990107443. The next prime is 25990107461. The reversal of 25990107457 is 75470109952.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23807255616 + 2182851841 = 154296^2 + 46721^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25990107457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25990107457.

It is not a weakly prime, because it can be changed into another prime (25990107427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12995053728 + 12995053729.

It is an arithmetic number, because the mean of its divisors is an integer number (12995053729).

Almost surely, 2^25990107457 is an apocalyptic number.

It is an amenable number.

25990107457 is a deficient number, since it is larger than the sum of its proper divisors (1).

25990107457 is an equidigital number, since it uses as much as digits as its factorization.

25990107457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 793800, while the sum is 49.

The spelling of 25990107457 in words is "twenty-five billion, nine hundred ninety million, one hundred seven thousand, four hundred fifty-seven".