25606983728 has 20 divisors (see below), whose sum is σ = 49657982400. Its totient is φ = 12792020544.

The previous prime is 25606983683. The next prime is 25606983751. The reversal of 25606983728 is 82738960652.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 698528 + ... + 734271.

It is an arithmetic number, because the mean of its divisors is an integer number (2482899120).

Almost surely, 2^25606983728 is an apocalyptic number.

It is an amenable number.

25606983728 is a deficient number, since it is larger than the sum of its proper divisors (24050998672).

25606983728 is a wasteful number, since it uses less digits than its factorization.

25606983728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1433924 (or 1433918 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 25606983728 in words is "twenty-five billion, six hundred six million, nine hundred eighty-three thousand, seven hundred twenty-eight".