25916666139 has 24 divisors (see below), whose sum is σ = 46074074592. Its totient is φ = 13670328960.

The previous prime is 25916666129. The next prime is 25916666177. The reversal of 25916666139 is 93166661952.

It is not a de Polignac number, because 25916666139 - 2¹² = 25916662043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25916666129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15821322 + ... + 15822959.

It is an arithmetic number, because the mean of its divisors is an integer number (1919753108).

Almost surely, 2^25916666139 is an apocalyptic number.

25916666139 is a deficient number, since it is larger than the sum of its proper divisors (20157408453).

25916666139 is a wasteful number, since it uses less digits than its factorization.

25916666139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31644307 (or 31644304 counting only the distinct ones).

The product of its digits is 3149280, while the sum is 54.

The spelling of 25916666139 in words is "twenty-five billion, nine hundred sixteen million, six hundred sixty-six thousand, one hundred thirty-nine".