25345517000 has 128 divisors (see below), whose sum is σ = 62381629440. Its totient is φ = 9619948800.

The previous prime is 25345516997. The next prime is 25345517053. The reversal of 25345517000 is 71554352.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2916662 + ... + 2925338.

It is an arithmetic number, because the mean of its divisors is an integer number (487356480).

Almost surely, 2^25345517000 is an apocalyptic number.

25345517000 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 25345517000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31190814720).

25345517000 is an abundant number, since it is smaller than the sum of its proper divisors (37036112440).

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

25345517000 is a wasteful number, since it uses less digits than its factorization.

25345517000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8848 (or 8834 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 32.

The spelling of 25345517000 in words is "twenty-five billion, three hundred forty-five million, five hundred seventeen thousand".