25087242840 has 128 divisors (see below), whose sum is σ = 82144177920. Its totient is φ = 6078758400.

The previous prime is 25087242833. The next prime is 25087242863. The reversal of 25087242840 is 4824278052.

It is a junction number, because it is equal to n+sod(n) for n = 25087242792 and 25087242801.

It is a congruent number.

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, 3918522 + ... + 3924918.

It is an arithmetic number, because the mean of its divisors is an integer number (641751390).

Almost surely, 2^25087242840 is an apocalyptic number.

25087242840 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 25087242840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41072088960).

25087242840 is an abundant number, since it is smaller than the sum of its proper divisors (57056935080).

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

25087242840 is a wasteful number, since it uses less digits than its factorization.

25087242840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9393 (or 9389 counting only the distinct ones).

The product of its (nonzero) digits is 286720, while the sum is 42.

The spelling of 25087242840 in words is "twenty-five billion, eighty-seven million, two hundred forty-two thousand, eight hundred forty".