25957327985 has 8 divisors (see below), whose sum is σ = 31990653096. Its totient is φ = 20204622720.

The previous prime is 25957327973. The next prime is 25957328011. The reversal of 25957327985 is 58972375952.

It can be written as a sum of positive squares in 4 ways, for example, as 5663616049 + 20293711936 = 75257^2 + 142456^2 .

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

It is not a de Polignac number, because 25957327985 - 2¹⁶ = 25957262449 is a prime.

It is a super-2 number, since 2×25957327985² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70154756 + ... + 70155125.

It is an arithmetic number, because the mean of its divisors is an integer number (3998831637).

Almost surely, 2^25957327985 is an apocalyptic number.

It is an amenable number.

25957327985 is a deficient number, since it is larger than the sum of its proper divisors (6033325111).

25957327985 is a wasteful number, since it uses less digits than its factorization.

25957327985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140309923.

The product of its digits is 47628000, while the sum is 62.

The spelling of 25957327985 in words is "twenty-five billion, nine hundred fifty-seven million, three hundred twenty-seven thousand, nine hundred eighty-five".