161600366985 has 16 divisors (see below), whose sum is σ = 258572692800. Its totient is φ = 86182827200.

The previous prime is 161600366981. The next prime is 161600367001. The reversal of 161600366985 is 589663006161.

It is not a de Polignac number, because 161600366985 - 2² = 161600366981 is a prime.

It is a super-2 number, since 2×161600366985² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161600366981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94210 + ... + 576260.

It is an arithmetic number, because the mean of its divisors is an integer number (16160793300).

Almost surely, 2^161600366985 is an apocalyptic number.

161600366985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161600366985 is a deficient number, since it is larger than the sum of its proper divisors (96972325815).

161600366985 is a wasteful number, since it uses less digits than its factorization.

161600366985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504408.

The product of its (nonzero) digits is 1399680, while the sum is 51.

The spelling of 161600366985 in words is "one hundred sixty-one billion, six hundred million, three hundred sixty-six thousand, nine hundred eighty-five".