161706683808 has 72 divisors (see below), whose sum is σ = 459919500768. Its totient is φ = 53894477952.

The previous prime is 161706683777. The next prime is 161706683813. The reversal of 161706683808 is 808386607161.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×161706683808² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2177335 + ... + 2250377.

It is an arithmetic number, because the mean of its divisors is an integer number (6387770844).

Almost surely, 2^161706683808 is an apocalyptic number.

161706683808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

161706683808 is an abundant number, since it is smaller than the sum of its proper divisors (298212816960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161706683808 is a wasteful number, since it uses less digits than its factorization.

161706683808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80746 (or 80735 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 161706683808 in words is "one hundred sixty-one billion, seven hundred six million, six hundred eighty-three thousand, eight hundred eight".