25316780238 has 24 divisors (see below), whose sum is σ = 56744508600. Its totient is φ = 8147929104.

The previous prime is 25316780227. The next prime is 25316780243. The reversal of 25316780238 is 83208761352.

25316780238 is a `hidden beast` number, since 2 + 531 + 6 + 7 + 80 + 2 + 38 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25316780193 and 25316780202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24249268 + ... + 24250311.

It is an arithmetic number, because the mean of its divisors is an integer number (2364354525).

Almost surely, 2^25316780238 is an apocalyptic number.

25316780238 is an abundant number, since it is smaller than the sum of its proper divisors (31427728362).

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

25316780238 is a wasteful number, since it uses less digits than its factorization.

25316780238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48499616 (or 48499613 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 25316780238 in words is "twenty-five billion, three hundred sixteen million, seven hundred eighty thousand, two hundred thirty-eight".