25138540659 has 8 divisors (see below), whose sum is σ = 33518923200. Its totient is φ = 16758592616.

The previous prime is 25138540639. The next prime is 25138540681. The reversal of 25138540659 is 95604583152.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25138540659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25138540639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66892 + ... + 233990.

It is an arithmetic number, because the mean of its divisors is an integer number (4189865400).

Almost surely, 2^25138540659 is an apocalyptic number.

25138540659 is a deficient number, since it is larger than the sum of its proper divisors (8380382541).

25138540659 is a wasteful number, since it uses less digits than its factorization.

25138540659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217249.

The product of its (nonzero) digits is 1296000, while the sum is 48.

The spelling of 25138540659 in words is "twenty-five billion, one hundred thirty-eight million, five hundred forty thousand, six hundred fifty-nine".