25998784032 has 96 divisors (see below), whose sum is σ = 73818319680. Its totient is φ = 7964605440.

The previous prime is 25998784013. The next prime is 25998784033. The reversal of 25998784032 is 23048789952.

It is a happy number.

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

It is a super-2 number, since 2×25998784032² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25998784033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240307 + ... + 331277.

It is an arithmetic number, because the mean of its divisors is an integer number (768940830).

Almost surely, 2^25998784032 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 25998784032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36909159840).

25998784032 is an abundant number, since it is smaller than the sum of its proper divisors (47819535648).

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

25998784032 is a wasteful number, since it uses less digits than its factorization.

25998784032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91226 (or 91218 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 57.

The spelling of 25998784032 in words is "twenty-five billion, nine hundred ninety-eight million, seven hundred eighty-four thousand, thirty-two".