25623209425 has 12 divisors (see below), whose sum is σ = 34661214576. Its totient is φ = 18635061200.

The previous prime is 25623209419. The next prime is 25623209431. The reversal of 25623209425 is 52490232652.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25623209419) and next prime (25623209431).

It is not a de Polignac number, because 25623209425 - 2²¹ = 25621112273 is a prime.

It is a super-3 number, since 3×25623209425³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 46587379 + ... + 46587928.

It is an arithmetic number, because the mean of its divisors is an integer number (2888434548).

Almost surely, 2^25623209425 is an apocalyptic number.

25623209425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25623209425 is a deficient number, since it is larger than the sum of its proper divisors (9038005151).

25623209425 is a wasteful number, since it uses less digits than its factorization.

25623209425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93175328 (or 93175323 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 40.

The spelling of 25623209425 in words is "twenty-five billion, six hundred twenty-three million, two hundred nine thousand, four hundred twenty-five".