25550713728 has 96 divisors (see below), whose sum is σ = 73833271200. Its totient is φ = 8481177600.

The previous prime is 25550713723. The next prime is 25550713739. The reversal of 25550713728 is 82731705552.

25550713728 is a `hidden beast` number, since 2 + 5 + 5 + 507 + 137 + 2 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25550713723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 228928 + ... + 321728.

It is an arithmetic number, because the mean of its divisors is an integer number (769096575).

Almost surely, 2^25550713728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25550713728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36916635600).

25550713728 is an abundant number, since it is smaller than the sum of its proper divisors (48282557472).

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

25550713728 is a wasteful number, since it uses less digits than its factorization.

25550713728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93060 (or 93045 counting only the distinct ones).

The product of its (nonzero) digits is 588000, while the sum is 45.

The spelling of 25550713728 in words is "twenty-five billion, five hundred fifty million, seven hundred thirteen thousand, seven hundred twenty-eight".