9999953243875 has 128 divisors (see below), whose sum is σ = 15276202905600. Its totient is φ = 6383193984000.

The previous prime is 9999953243821. The next prime is 9999953243887. The reversal of 9999953243875 is 5783423599999.

9999953243875 is a nontrivial binomial coefficient, being equal to C(4472126, 2).

It is not a de Polignac number, because 9999953243875 - 2¹⁵ = 9999953211107 is a prime.

It is a super-2 number, since 2×9999953243875² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 326449810 + ... + 326480440.

It is an arithmetic number, because the mean of its divisors is an integer number (119345335200).

Almost surely, 2^{9999953243875} is an apocalyptic number.

9999953243875 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

9999953243875 is the 4472125-th triangular number and also the 2236063-rd hexagonal number.

9999953243875 is the 1490709-th centered nonagonal number.

9999953243875 is a deficient number, since it is larger than the sum of its proper divisors (5276249661725).

9999953243875 is a wasteful number, since it uses less digits than its factorization.

9999953243875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31014 (or 31004 counting only the distinct ones).

The product of its digits is 5952139200, while the sum is 82.

The spelling of 9999953243875 in words is "nine trillion, nine hundred ninety-nine billion, nine hundred fifty-three million, two hundred forty-three thousand, eight hundred seventy-five".