259988396899 has 24 divisors (see below), whose sum is σ = 330407557056. Its totient is φ = 202294890000.

The previous prime is 259988396861. The next prime is 259988396939. The reversal of 259988396899 is 998693889952.

It is a happy number.

It is not a de Polignac number, because 259988396899 - 2⁹ = 259988396387 is a prime.

It is a super-2 number, since 2×259988396899² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (259988396099) 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, 23424 + ... + 721474.

It is an arithmetic number, because the mean of its divisors is an integer number (13766981544).

Almost surely, 2^259988396899 is an apocalyptic number.

259988396899 is a deficient number, since it is larger than the sum of its proper divisors (70419160157).

259988396899 is a wasteful number, since it uses less digits than its factorization.

259988396899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698767 (or 698760 counting only the distinct ones).

The product of its digits is 5441955840, while the sum is 85.

The spelling of 259988396899 in words is "two hundred fifty-nine billion, nine hundred eighty-eight million, three hundred ninety-six thousand, eight hundred ninety-nine".