25708085739 has 18 divisors (see below), whose sum is σ = 43196580180. Its totient is φ = 14690334456.

The previous prime is 25708085731. The next prime is 25708085749. The reversal of 25708085739 is 93758080752.

It is not a de Polignac number, because 25708085739 - 2³ = 25708085731 is a prime.

It is a super-2 number, since 2×25708085739² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25708085731) 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 17 ways as a sum of consecutive naturals, for example, 29147049 + ... + 29147930.

It is an arithmetic number, because the mean of its divisors is an integer number (2399810010).

Almost surely, 2^25708085739 is an apocalyptic number.

25708085739 is a deficient number, since it is larger than the sum of its proper divisors (17488494441).

25708085739 is a wasteful number, since it uses less digits than its factorization.

25708085739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58294999 (or 58294989 counting only the distinct ones).

The product of its (nonzero) digits is 4233600, while the sum is 54.

The spelling of 25708085739 in words is "twenty-five billion, seven hundred eight million, eighty-five thousand, seven hundred thirty-nine".