25120868728 has 32 divisors (see below), whose sum is σ = 47684376000. Its totient is φ = 12405352960.

The previous prime is 25120868723. The next prime is 25120868807. The reversal of 25120868728 is 82786802152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25120868723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 629268 + ... + 667996.

It is an arithmetic number, because the mean of its divisors is an integer number (1490136750).

Almost surely, 2^25120868728 is an apocalyptic number.

It is an amenable number.

25120868728 is a deficient number, since it is larger than the sum of its proper divisors (22563507272).

25120868728 is a wasteful number, since it uses less digits than its factorization.

25120868728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39735 (or 39731 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 49.

The spelling of 25120868728 in words is "twenty-five billion, one hundred twenty million, eight hundred sixty-eight thousand, seven hundred twenty-eight".