25698940017 has 16 divisors (see below), whose sum is σ = 34405629120. Its totient is φ = 17062488000.

The previous prime is 25698940013. The next prime is 25698940019. The reversal of 25698940017 is 71004989652.

It is not a de Polignac number, because 25698940017 - 2² = 25698940013 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25698940013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3168267 + ... + 3176367.

It is an arithmetic number, because the mean of its divisors is an integer number (2150351820).

Almost surely, 2^25698940017 is an apocalyptic number.

It is an amenable number.

25698940017 is a deficient number, since it is larger than the sum of its proper divisors (8706689103).

25698940017 is a wasteful number, since it uses less digits than its factorization.

25698940017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12304.

The product of its (nonzero) digits is 1088640, while the sum is 51.

The spelling of 25698940017 in words is "twenty-five billion, six hundred ninety-eight million, nine hundred forty thousand, seventeen".