25570803457 has 2 divisors, whose sum is σ = 25570803458. Its totient is φ = 25570803456.

The previous prime is 25570803353. The next prime is 25570803493. The reversal of 25570803457 is 75430807552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13188455281 + 12382348176 = 114841^2 + 111276^2 .

It is a cyclic number.

It is not a de Polignac number, because 25570803457 - 2⁷ = 25570803329 is a prime.

It is not a weakly prime, because it can be changed into another prime (25570803257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12785401728 + 12785401729.

It is an arithmetic number, because the mean of its divisors is an integer number (12785401729).

Almost surely, 2^25570803457 is an apocalyptic number.

It is an amenable number.

25570803457 is a deficient number, since it is larger than the sum of its proper divisors (1).

25570803457 is an equidigital number, since it uses as much as digits as its factorization.

25570803457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1176000, while the sum is 46.

The spelling of 25570803457 in words is "twenty-five billion, five hundred seventy million, eight hundred three thousand, four hundred fifty-seven".