990161850675634 has 36 divisors (see below), whose sum is σ = 1870857070022394. Its totient is φ = 391712380480512.

The previous prime is 990161850675619. The next prime is 990161850675643. The reversal of 990161850675634 is 436576058161099.

It can be written as a sum of positive squares in 3 ways, for example, as 752081425354609 + 238080425321025 = 27424103^2 + 15429855^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 29892564367 + ... + 29892597490.

Almost surely, 2^{990161850675634} is an apocalyptic number.

990161850675634 is a deficient number, since it is larger than the sum of its proper divisors (880695219346760).

990161850675634 is a wasteful number, since it uses less digits than its factorization.

990161850675634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59785161899 (or 59785161879 counting only the distinct ones).

The product of its (nonzero) digits is 293932800, while the sum is 70.

The spelling of 990161850675634 in words is "nine hundred ninety trillion, one hundred sixty-one billion, eight hundred fifty million, six hundred seventy-five thousand, six hundred thirty-four".