999998745566446 has 32 divisors (see below), whose sum is σ = 1525064682083328. Its totient is φ = 491722829781120.

The previous prime is 999998745566437. The next prime is 999998745566497. The reversal of 999998745566446 is 644665547899999.

999998745566446 is a nontrivial binomial coefficient, being equal to C(44721332, 2).

It is a super-2 number, since 2×999998745566446² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1 + ... + 44721331.

It is an arithmetic number, because the mean of its divisors is an integer number (47658271315104).

Almost surely, 2^{999998745566446} is an apocalyptic number.

999998745566446 is the 44721331-st triangular number and also the 22360666-th hexagonal number.

999998745566446 is the 14907111-st centered nonagonal number.

999998745566446 is a deficient number, since it is larger than the sum of its proper divisors (525065936516882).

999998745566446 is a wasteful number, since it uses less digits than its factorization.

999998745566446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44722216.

The product of its digits is 1142810726400, while the sum is 100.

The spelling of 999998745566446 in words is "nine hundred ninety-nine trillion, nine hundred ninety-eight billion, seven hundred forty-five million, five hundred sixty-six thousand, four hundred forty-six".