25426120025 has 6 divisors (see below), whose sum is σ = 31528388862. Its totient is φ = 20340896000.

The previous prime is 25426120009. The next prime is 25426120061. The reversal of 25426120025 is 52002162452.

It can be written as a sum of positive squares in 3 ways, for example, as 3917257744 + 21508862281 = 62588^2 + 146659^2 .

It is not a de Polignac number, because 25426120025 - 2⁴ = 25426120009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25426120025.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 508522376 + ... + 508522425.

It is an arithmetic number, because the mean of its divisors is an integer number (5254731477).

Almost surely, 2^25426120025 is an apocalyptic number.

25426120025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25426120025 is a deficient number, since it is larger than the sum of its proper divisors (6102268837).

25426120025 is a wasteful number, since it uses less digits than its factorization.

25426120025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017044811 (or 1017044806 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 25426120025 its reverse (52002162452), we get a palindrome (77428282477).

The spelling of 25426120025 in words is "twenty-five billion, four hundred twenty-six million, one hundred twenty thousand, twenty-five".