25644613050 has 648 divisors, whose sum is σ = 89229379356. Its totient is φ = 5242890240.

The previous prime is 25644613021. The next prime is 25644613069. The reversal of 25644613050 is 5031644652.

25644613050 is a `hidden beast` number, since 2 + 5 + 644 + 6 + 1 + 3 + 0 + 5 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 18592140609 + 7052472441 = 136353^2 + 83979^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25644612996 and 25644613014.

It is an unprimeable number.

It is a polite number, since it can be written in 323 ways as a sum of consecutive naturals, for example, 596386329 + ... + 596386371.

Almost surely, 2^25644613050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25644613050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44614689678).

25644613050 is an abundant number, since it is smaller than the sum of its proper divisors (63584766306).

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

25644613050 is a wasteful number, since it uses less digits than its factorization.

25644613050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 25644613050 in words is "twenty-five billion, six hundred forty-four million, six hundred thirteen thousand, fifty".