25515625410 has 192 divisors, whose sum is σ = 73746391680. Its totient is φ = 6068874240.

The previous prime is 25515625357. The next prime is 25515625441. The reversal of 25515625410 is 1452651552.

25515625410 is a `hidden beast` number, since 2 + 5 + 5 + 15 + 625 + 4 + 10 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 20760676 + ... + 20761904.

It is an arithmetic number, because the mean of its divisors is an integer number (384095790).

Almost surely, 2^25515625410 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25515625410, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36873195840).

25515625410 is an abundant number, since it is smaller than the sum of its proper divisors (48230766270).

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

25515625410 is a wasteful number, since it uses less digits than its factorization.

25515625410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1633 (or 1630 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

The spelling of 25515625410 in words is "twenty-five billion, five hundred fifteen million, six hundred twenty-five thousand, four hundred ten".