25646630130 has 128 divisors (see below), whose sum is σ = 74944880640. Its totient is φ = 6189324480.

The previous prime is 25646630129. The next prime is 25646630147. The reversal of 25646630130 is 3103664652.

25646630130 is a `hidden beast` number, since 2 + 5 + 6 + 4 + 6 + 630 + 13 + 0 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 642949 + ... + 681671.

It is an arithmetic number, because the mean of its divisors is an integer number (585506880).

Almost surely, 2^25646630130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25646630130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37472440320).

25646630130 is an abundant number, since it is smaller than the sum of its proper divisors (49298250510).

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

25646630130 is a wasteful number, since it uses less digits than its factorization.

25646630130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38973 (or 38967 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The spelling of 25646630130 in words is "twenty-five billion, six hundred forty-six million, six hundred thirty thousand, one hundred thirty".