25644245530 has 16 divisors (see below), whose sum is σ = 46161633024. Its totient is φ = 10257255760.

The previous prime is 25644245507. The next prime is 25644245573. The reversal of 25644245530 is 3554244652.

It is a happy number.

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, 291939 + ... + 369481.

It is an arithmetic number, because the mean of its divisors is an integer number (2885102064).

Almost surely, 2^25644245530 is an apocalyptic number.

25644245530 is a deficient number, since it is larger than the sum of its proper divisors (20517387494).

25644245530 is a wasteful number, since it uses less digits than its factorization.

25644245530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110621.

The product of its (nonzero) digits is 576000, while the sum is 40.

The spelling of 25644245530 in words is "twenty-five billion, six hundred forty-four million, two hundred forty-five thousand, five hundred thirty".