25398225216 has 560 divisors, whose sum is σ = 98144234496. Its totient is φ = 6302416896.

The previous prime is 25398225161. The next prime is 25398225239. The reversal of 25398225216 is 61252289352.

25398225216 is a `hidden beast` number, since 2 + 5 + 398 + 2 + 252 + 1 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 8018065 + ... + 8021231.

Almost surely, 2^25398225216 is an apocalyptic number.

25398225216 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25398225216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49072117248).

25398225216 is an abundant number, since it is smaller than the sum of its proper divisors (72746009280).

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

25398225216 is a wasteful number, since it uses less digits than its factorization.

25398225216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3228 (or 3209 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The spelling of 25398225216 in words is "twenty-five billion, three hundred ninety-eight million, two hundred twenty-five thousand, two hundred sixteen".