259196943064521 has 48 divisors (see below), whose sum is σ = 442996968176000. Its totient is φ = 134647762566240.

The previous prime is 259196943064513. The next prime is 259196943064571. The reversal of 259196943064521 is 125460349691952.

It is not a de Polignac number, because 259196943064521 - 2³ = 259196943064513 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (259196943064571) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1040751826 + ... + 1041000843.

Almost surely, 2^{259196943064521} is an apocalyptic number.

259196943064521 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

259196943064521 is a deficient number, since it is larger than the sum of its proper divisors (183800025111479).

259196943064521 is a wasteful number, since it uses less digits than its factorization.

259196943064521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2081752715 (or 2081752690 counting only the distinct ones).

The product of its (nonzero) digits is 125971200, while the sum is 66.

The spelling of 259196943064521 in words is "two hundred fifty-nine trillion, one hundred ninety-six billion, nine hundred forty-three million, sixty-four thousand, five hundred twenty-one".