25595447057 has 4 divisors (see below), whose sum is σ = 25596431796. Its totient is φ = 25594462320.

The previous prime is 25595447051. The next prime is 25595447069. The reversal of 25595447057 is 75074459552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16417040641 + 9178406416 = 128129^2 + 95804^2 .

It is a cyclic number.

It is not a de Polignac number, because 25595447057 - 2¹⁶ = 25595381521 is a prime.

It is a super-2 number, since 2×25595447057² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25595447051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 452294 + ... + 505727.

It is an arithmetic number, because the mean of its divisors is an integer number (6399107949).

Almost surely, 2^25595447057 is an apocalyptic number.

It is an amenable number.

25595447057 is a deficient number, since it is larger than the sum of its proper divisors (984739).

25595447057 is an equidigital number, since it uses as much as digits as its factorization.

25595447057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984738.

The product of its (nonzero) digits is 8820000, while the sum is 53.

The spelling of 25595447057 in words is "twenty-five billion, five hundred ninety-five million, four hundred forty-seven thousand, fifty-seven".