25478535630 has 32 divisors (see below), whose sum is σ = 64745456544. Its totient is φ = 6394612736.

The previous prime is 25478535619. The next prime is 25478535631. The reversal of 25478535630 is 3653587452.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 25478535630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25478535631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24978447 + ... + 24979466.

It is an arithmetic number, because the mean of its divisors is an integer number (2023295517).

Almost surely, 2^25478535630 is an apocalyptic number.

25478535630 is an abundant number, since it is smaller than the sum of its proper divisors (39266920914).

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

25478535630 is a wasteful number, since it uses less digits than its factorization.

25478535630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49957940.

The product of its (nonzero) digits is 3024000, while the sum is 48.

The spelling of 25478535630 in words is "twenty-five billion, four hundred seventy-eight million, five hundred thirty-five thousand, six hundred thirty".