25718725138 has 8 divisors (see below), whose sum is σ = 38751084288. Its totient is φ = 12801697044.

The previous prime is 25718725121. The next prime is 25718725181. The reversal of 25718725138 is 83152781752.

25718725138 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×25718725138² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25718725091 and 25718725100.

It is an unprimeable number.

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, 28832206 + ... + 28833097.

It is an arithmetic number, because the mean of its divisors is an integer number (4843885536).

Almost surely, 2^25718725138 is an apocalyptic number.

25718725138 is a deficient number, since it is larger than the sum of its proper divisors (13032359150).

25718725138 is a wasteful number, since it uses less digits than its factorization.

25718725138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57665528.

The product of its digits is 940800, while the sum is 49.

The spelling of 25718725138 in words is "twenty-five billion, seven hundred eighteen million, seven hundred twenty-five thousand, one hundred thirty-eight".