25550535320 has 64 divisors (see below), whose sum is σ = 60094872000. Its totient is φ = 9758476288.

The previous prime is 25550535319. The next prime is 25550535337. The reversal of 25550535320 is 2353505552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 499076 + ... + 547884.

It is an arithmetic number, because the mean of its divisors is an integer number (938982375).

Almost surely, 2^25550535320 is an apocalyptic number.

25550535320 is a gapful number since it is divisible by the number (20) 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 25550535320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30047436000).

25550535320 is an abundant number, since it is smaller than the sum of its proper divisors (34544336680).

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

25550535320 is a wasteful number, since it uses less digits than its factorization.

25550535320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49412 (or 49408 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 35.

The spelling of 25550535320 in words is "twenty-five billion, five hundred fifty million, five hundred thirty-five thousand, three hundred twenty".