25316850647 has 4 divisors (see below), whose sum is σ = 27618382536. Its totient is φ = 23015318760.

The previous prime is 25316850589. The next prime is 25316850661. The reversal of 25316850647 is 74605861352.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25316850647 - 2⁶ = 25316850583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25316850947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1150765928 + ... + 1150765949.

It is an arithmetic number, because the mean of its divisors is an integer number (6904595634).

Almost surely, 2^25316850647 is an apocalyptic number.

25316850647 is a deficient number, since it is larger than the sum of its proper divisors (2301531889).

25316850647 is a wasteful number, since it uses less digits than its factorization.

25316850647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2301531888.

The product of its (nonzero) digits is 1209600, while the sum is 47.

The spelling of 25316850647 in words is "twenty-five billion, three hundred sixteen million, eight hundred fifty thousand, six hundred forty-seven".