25840724236 has 6 divisors (see below), whose sum is σ = 45221267420. Its totient is φ = 12920362116.

The previous prime is 25840724197. The next prime is 25840724237. The reversal of 25840724236 is 63242704852.

It is a junction number, because it is equal to n+sod(n) for n = 25840724192 and 25840724201.

It is not an unprimeable number, because it can be changed into a prime (25840724237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3230090526 + ... + 3230090533.

Almost surely, 2^25840724236 is an apocalyptic number.

It is an amenable number.

25840724236 is a deficient number, since it is larger than the sum of its proper divisors (19380543184).

25840724236 is a wasteful number, since it uses less digits than its factorization.

25840724236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6460181063 (or 6460181061 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 43.

The spelling of 25840724236 in words is "twenty-five billion, eight hundred forty million, seven hundred twenty-four thousand, two hundred thirty-six".