999961448323753 has 4 divisors (see below), whose sum is σ = 999961515404500. Its totient is φ = 999961381243008.

The previous prime is 999961448323723. The next prime is 999961448323769. The reversal of 999961448323753 is 357323844169999.

999961448323753 is a nontrivial binomial coefficient, being equal to C(44720498, 2).

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 578964588792489 + 420996859531264 = 24061683^2 + 20518208^2 .

It is a 3-Lehmer number, since φ(999961448323753) divides (999961448323753-1)³.

It is a cyclic number.

It is not a de Polignac number, because 999961448323753 - 2⁴⁵ = 964777076234921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (999961448323723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1 + ... + 44720497.

It is an arithmetic number, because the mean of its divisors is an integer number (249990378851125).

It is a Poulet number, since it divides 2^{999961448323752}-1.

Almost surely, 2^{999961448323753} is an apocalyptic number.

999961448323753 is the 44720497-th triangular number and also the 22360249-th hexagonal number.

999961448323753 is the 14906833-rd centered nonagonal number.

It is an amenable number.

999961448323753 is a deficient number, since it is larger than the sum of its proper divisors (67080747).

999961448323753 is a wasteful number, since it uses less digits than its factorization.

999961448323753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67080746.

The product of its digits is 9523422720, while the sum is 82.

The spelling of 999961448323753 in words is "nine hundred ninety-nine trillion, nine hundred sixty-one billion, four hundred forty-eight million, three hundred twenty-three thousand, seven hundred fifty-three".