161804430668 has 12 divisors (see below), whose sum is σ = 283163900040. Its totient is φ = 80900459232.

The previous prime is 161804430659. The next prime is 161804430737. The reversal of 161804430668 is 866034408161.

161804430668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×161804430668³ (a number of 35 digits) contains 333 as substring.

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 3 ways as a sum of consecutive naturals, for example, 219521 + ... + 609752.

It is an arithmetic number, because the mean of its divisors is an integer number (23596991670).

Almost surely, 2^161804430668 is an apocalyptic number.

It is an amenable number.

161804430668 is a deficient number, since it is larger than the sum of its proper divisors (121359469372).

161804430668 is a wasteful number, since it uses less digits than its factorization.

161804430668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878056 (or 878054 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 47.

The spelling of 161804430668 in words is "one hundred sixty-one billion, eight hundred four million, four hundred thirty thousand, six hundred sixty-eight".