9943136842 has 16 divisors (see below), whose sum is σ = 15123669192. Its totient is φ = 4901955840.

The previous prime is 9943136821. The next prime is 9943136849. The reversal of 9943136842 is 2486313499.

It can be written as a sum of positive squares in 4 ways, for example, as 5754587881 + 4188548961 = 75859^2 + 64719^2 .

It is not an unprimeable number, because it can be changed into a prime (9943136849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 578598 + ... + 595534.

Almost surely, 2^9943136842 is an apocalyptic number.

9943136842 is a deficient number, since it is larger than the sum of its proper divisors (5180532350).

9943136842 is a wasteful number, since it uses less digits than its factorization.

9943136842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21033.

The product of its digits is 1119744, while the sum is 49.

The square root of 9943136842 is about 99715.2788794175. The cubic root of 9943136842 is about 2150.3433266038.

The spelling of 9943136842 in words is "nine billion, nine hundred forty-three million, one hundred thirty-six thousand, eight hundred forty-two".