25345402425 has 72 divisors (see below), whose sum is σ = 54933555456. Its totient is φ = 10904901120.

The previous prime is 25345402387. The next prime is 25345402477. The reversal of 25345402425 is 52420454352.

It is not a de Polignac number, because 25345402425 - 2⁶ = 25345402361 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25345402425.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 446529 + ... + 500078.

It is an arithmetic number, because the mean of its divisors is an integer number (762966048).

Almost surely, 2^25345402425 is an apocalyptic number.

25345402425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25345402425 is an abundant number, since it is smaller than the sum of its proper divisors (29588153031).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25345402425 is a wasteful number, since it uses less digits than its factorization.

25345402425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946647 (or 946639 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 36.

Adding to 25345402425 its reverse (52420454352), we get a palindrome (77765856777).

The spelling of 25345402425 in words is "twenty-five billion, three hundred forty-five million, four hundred two thousand, four hundred twenty-five".