25345408998 has 128 divisors (see below), whose sum is σ = 64890040320. Its totient is φ = 6421109760.

The previous prime is 25345408993. The next prime is 25345409051. The reversal of 25345408998 is 89980454352.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25345408993) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1588018 + ... + 1603898.

It is an arithmetic number, because the mean of its divisors is an integer number (506953440).

Almost surely, 2^25345408998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25345408998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32445020160).

25345408998 is an abundant number, since it is smaller than the sum of its proper divisors (39544631322).

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

25345408998 is a wasteful number, since it uses less digits than its factorization.

25345408998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16022.

The product of its (nonzero) digits is 12441600, while the sum is 57.

The spelling of 25345408998 in words is "twenty-five billion, three hundred forty-five million, four hundred eight thousand, nine hundred ninety-eight".