25924525421 has 2 divisors, whose sum is σ = 25924525422. Its totient is φ = 25924525420.

The previous prime is 25924525397. The next prime is 25924525469. The reversal of 25924525421 is 12452542952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25667564521 + 256960900 = 160211^2 + 16030^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25924525421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25924525021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12962262710 + 12962262711.

It is an arithmetic number, because the mean of its divisors is an integer number (12962262711).

Almost surely, 2^25924525421 is an apocalyptic number.

It is an amenable number.

25924525421 is a deficient number, since it is larger than the sum of its proper divisors (1).

25924525421 is an equidigital number, since it uses as much as digits as its factorization.

25924525421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288000, while the sum is 41.

The spelling of 25924525421 in words is "twenty-five billion, nine hundred twenty-four million, five hundred twenty-five thousand, four hundred twenty-one".