25105355660 has 96 divisors (see below), whose sum is σ = 65779983360. Its totient is φ = 7819142400.

The previous prime is 25105355629. The next prime is 25105355701. The reversal of 25105355660 is 6655350152.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2321546 + ... + 2332334.

It is an arithmetic number, because the mean of its divisors is an integer number (685208160).

Almost surely, 2^25105355660 is an apocalyptic number.

25105355660 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 25105355660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32889991680).

25105355660 is an abundant number, since it is smaller than the sum of its proper divisors (40674627700).

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

25105355660 is a wasteful number, since it uses less digits than its factorization.

25105355660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12327 (or 12325 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 38.

The spelling of 25105355660 in words is "twenty-five billion, one hundred five million, three hundred fifty-five thousand, six hundred sixty".