25445402551 has 2 divisors, whose sum is σ = 25445402552. Its totient is φ = 25445402550.

The previous prime is 25445402539. The next prime is 25445402557. The reversal of 25445402551 is 15520454452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25445402551 - 2⁹ = 25445402039 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25445402551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25445402557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12722701275 + 12722701276.

It is an arithmetic number, because the mean of its divisors is an integer number (12722701276).

Almost surely, 2^25445402551 is an apocalyptic number.

25445402551 is a deficient number, since it is larger than the sum of its proper divisors (1).

25445402551 is an equidigital number, since it uses as much as digits as its factorization.

25445402551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160000, while the sum is 37.

The spelling of 25445402551 in words is "twenty-five billion, four hundred forty-five million, four hundred two thousand, five hundred fifty-one".