25284915700 has 144 divisors (see below), whose sum is σ = 62092775808. Its totient is φ = 8856000000.

The previous prime is 25284915679. The next prime is 25284915709. The reversal of 25284915700 is 751948252.

It is a super-2 number, since 2×25284915700² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25284915709) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4107625 + ... + 4113775.

It is an arithmetic number, because the mean of its divisors is an integer number (431199832).

Almost surely, 2^25284915700 is an apocalyptic number.

25284915700 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 25284915700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31046387904).

25284915700 is an abundant number, since it is smaller than the sum of its proper divisors (36807860108).

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

25284915700 is a wasteful number, since it uses less digits than its factorization.

25284915700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6314 (or 6307 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 43.

The spelling of 25284915700 in words is "twenty-five billion, two hundred eighty-four million, nine hundred fifteen thousand, seven hundred".