161099665393 has 8 divisors (see below), whose sum is σ = 161421021056. Its totient is φ = 160778520000.

The previous prime is 161099665387. The next prime is 161099665399. The reversal of 161099665393 is 393566990161.

161099665393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (161099665387) and next prime (161099665399).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161099665393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161099665399) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1528393 + ... + 1630393.

It is an arithmetic number, because the mean of its divisors is an integer number (20177627632).

Almost surely, 2^161099665393 is an apocalyptic number.

It is an amenable number.

161099665393 is a deficient number, since it is larger than the sum of its proper divisors (321355663).

161099665393 is a wasteful number, since it uses less digits than its factorization.

161099665393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105135.

The product of its (nonzero) digits is 7085880, while the sum is 58.

The spelling of 161099665393 in words is "one hundred sixty-one billion, ninety-nine million, six hundred sixty-five thousand, three hundred ninety-three".