25243963992 has 144 divisors (see below), whose sum is σ = 74972757600. Its totient is φ = 7668760320.

The previous prime is 25243963933. The next prime is 25243964017. The reversal of 25243963992 is 29936934252.

25243963992 is a `hidden beast` number, since 2 + 5 + 243 + 9 + 6 + 399 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 948142 + ... + 974402.

It is an arithmetic number, because the mean of its divisors is an integer number (520644150).

Almost surely, 2^25243963992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25243963992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37486378800).

25243963992 is an abundant number, since it is smaller than the sum of its proper divisors (49728793608).

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

25243963992 is a wasteful number, since it uses less digits than its factorization.

25243963992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26378 (or 26358 counting only the distinct ones).

The product of its digits is 6298560, while the sum is 54.

The spelling of 25243963992 in words is "twenty-five billion, two hundred forty-three million, nine hundred sixty-three thousand, nine hundred ninety-two".