25821223630 has 32 divisors (see below), whose sum is σ = 48934892160. Its totient is φ = 9782791200.

The previous prime is 25821223627. The next prime is 25821223657. The reversal of 25821223630 is 3632212852.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1100077 + ... + 1123303.

It is an arithmetic number, because the mean of its divisors is an integer number (1529215380).

Almost surely, 2^25821223630 is an apocalyptic number.

25821223630 is a deficient number, since it is larger than the sum of its proper divisors (23113668530).

25821223630 is a wasteful number, since it uses less digits than its factorization.

25821223630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29104.

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 25821223630 in words is "twenty-five billion, eight hundred twenty-one million, two hundred twenty-three thousand, six hundred thirty".