25285122160 has 80 divisors (see below), whose sum is σ = 60463290816. Its totient is φ = 9826596864.

The previous prime is 25285122143. The next prime is 25285122199. The reversal of 25285122160 is 6122158252.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×25285122160² (a number of 22 digits) contains 22 as substring.

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, 2193532 + ... + 2205028.

Almost surely, 2^25285122160 is an apocalyptic number.

25285122160 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 25285122160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30231645408).

25285122160 is an abundant number, since it is smaller than the sum of its proper divisors (35178168656).

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

25285122160 is a wasteful number, since it uses less digits than its factorization.

25285122160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12290 (or 12284 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 34.

The spelling of 25285122160 in words is "twenty-five billion, two hundred eighty-five million, one hundred twenty-two thousand, one hundred sixty".