9999953243874 has 128 divisors (see below), whose sum is σ = 24471528192000. Its totient is φ = 3001771016640.

The previous prime is 9999953243821. The next prime is 9999953243887. The reversal of 9999953243874 is 4783423599999.

9999953243874 is a `hidden beast` number, since 9 + 9 + 9 + 9 + 9 + 532 + 4 + 3 + 8 + 74 = 666.

It is a super-2 number, since 2×9999953243874² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9999953243793 and 9999953243802.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 26646424 + ... + 27019100.

It is an arithmetic number, because the mean of its divisors is an integer number (191183814000).

Almost surely, 2^{9999953243874} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9999953243874, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12235764096000).

9999953243874 is an abundant number, since it is smaller than the sum of its proper divisors (14471574948126).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9999953243874 is a wasteful number, since it uses less digits than its factorization.

9999953243874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373125 (or 373119 counting only the distinct ones).

The product of its digits is 4761711360, while the sum is 81.

The spelling of 9999953243874 in words is "nine trillion, nine hundred ninety-nine billion, nine hundred fifty-three million, two hundred forty-three thousand, eight hundred seventy-four".