25420875616 has 24 divisors (see below), whose sum is σ = 50051731464. Its totient is φ = 12709324800.

The previous prime is 25420875607. The next prime is 25420875617. The reversal of 25420875616 is 61657802452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25420875617) 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, 433251 + ... + 488413.

It is an arithmetic number, because the mean of its divisors is an integer number (2085488811).

Almost surely, 2^25420875616 is an apocalyptic number.

It is an amenable number.

25420875616 is a deficient number, since it is larger than the sum of its proper divisors (24630855848).

25420875616 is a wasteful number, since it uses less digits than its factorization.

25420875616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69574 (or 69566 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 46.

The spelling of 25420875616 in words is "twenty-five billion, four hundred twenty million, eight hundred seventy-five thousand, six hundred sixteen".