25504502540 has 24 divisors (see below), whose sum is σ = 58428497232. Its totient is φ = 9274364480.

The previous prime is 25504502519. The next prime is 25504502561. The reversal of 25504502540 is 4520540552.

It is an interprime number because it is at equal distance from previous prime (25504502519) and next prime (25504502561).

It is a junction number, because it is equal to n+sod(n) for n = 25504502497 and 25504502506.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57964559 + ... + 57964998.

It is an arithmetic number, because the mean of its divisors is an integer number (2434520718).

Almost surely, 2^25504502540 is an apocalyptic number.

25504502540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25504502540 is an abundant number, since it is smaller than the sum of its proper divisors (32923994692).

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

25504502540 is a wasteful number, since it uses less digits than its factorization.

25504502540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115929577 (or 115929575 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 32.

The spelling of 25504502540 in words is "twenty-five billion, five hundred four million, five hundred two thousand, five hundred forty".