25361989451 has 2 divisors, whose sum is σ = 25361989452. Its totient is φ = 25361989450.

The previous prime is 25361989441. The next prime is 25361989453. The reversal of 25361989451 is 15498916352.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25361989451 - 2³⁴ = 8182120267 is a prime.

Together with 25361989453, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25361989393 and 25361989402.

It is not a weakly prime, because it can be changed into another prime (25361989453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12680994725 + 12680994726.

It is an arithmetic number, because the mean of its divisors is an integer number (12680994726).

Almost surely, 2^25361989451 is an apocalyptic number.

25361989451 is a deficient number, since it is larger than the sum of its proper divisors (1).

25361989451 is an equidigital number, since it uses as much as digits as its factorization.

25361989451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2332800, while the sum is 53.

The spelling of 25361989451 in words is "twenty-five billion, three hundred sixty-one million, nine hundred eighty-nine thousand, four hundred fifty-one".