25720684159 has 8 divisors (see below), whose sum is σ = 26552789120. Its totient is φ = 24888729600.

The previous prime is 25720684117. The next prime is 25720684169. The reversal of 25720684159 is 95148602752.

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

It is a cyclic number.

It is not a de Polignac number, because 25720684159 - 2¹⁵ = 25720651391 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 (25720684169) 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, 385807 + ... + 447535.

It is an arithmetic number, because the mean of its divisors is an integer number (3319098640).

Almost surely, 2^25720684159 is an apocalyptic number.

25720684159 is a deficient number, since it is larger than the sum of its proper divisors (832104961).

25720684159 is a wasteful number, since it uses less digits than its factorization.

25720684159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75201.

The product of its (nonzero) digits is 1209600, while the sum is 49.

The spelling of 25720684159 in words is "twenty-five billion, seven hundred twenty million, six hundred eighty-four thousand, one hundred fifty-nine".