25421957630 has 32 divisors (see below), whose sum is σ = 48384000000. Its totient is φ = 9590368032.

The previous prime is 25421957609. The next prime is 25421957683. The reversal of 25421957630 is 3675912452.

It is a Curzon number.

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, 257630 + ... + 342369.

It is an arithmetic number, because the mean of its divisors is an integer number (1512000000).

Almost surely, 2^25421957630 is an apocalyptic number.

25421957630 is a deficient number, since it is larger than the sum of its proper divisors (22962042370).

25421957630 is a wasteful number, since it uses less digits than its factorization.

25421957630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600248.

The product of its (nonzero) digits is 453600, while the sum is 44.

The spelling of 25421957630 in words is "twenty-five billion, four hundred twenty-one million, nine hundred fifty-seven thousand, six hundred thirty".