161783331163899 has 8 divisors (see below), whose sum is σ = 227064324440640. Its totient is φ = 102178945998216.

The previous prime is 161783331163891. The next prime is 161783331163921. The reversal of 161783331163899 is 998361133387161.

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

It is not a de Polignac number, because 161783331163899 - 2³ = 161783331163891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161783331163891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1419152027697 + ... + 1419152027810.

It is an arithmetic number, because the mean of its divisors is an integer number (28383040555080).

Almost surely, 2^{161783331163899} is an apocalyptic number.

161783331163899 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

161783331163899 is a deficient number, since it is larger than the sum of its proper divisors (65280993276741).

161783331163899 is a wasteful number, since it uses less digits than its factorization.

161783331163899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2838304055529.

The product of its digits is 105815808, while the sum is 69.

The spelling of 161783331163899 in words is "one hundred sixty-one trillion, seven hundred eighty-three billion, three hundred thirty-one million, one hundred sixty-three thousand, eight hundred ninety-nine".