161837818618 has 16 divisors (see below), whose sum is σ = 278328345984. Its totient is φ = 69136043760.

The previous prime is 161837818609. The next prime is 161837818633. The reversal of 161837818618 is 816818738161.

161837818618 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 18580605 + ... + 18589312.

It is an arithmetic number, because the mean of its divisors is an integer number (17395521624).

Almost surely, 2^161837818618 is an apocalyptic number.

161837818618 is a deficient number, since it is larger than the sum of its proper divisors (116490527366).

161837818618 is a wasteful number, since it uses less digits than its factorization.

161837818618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37170237.

The product of its digits is 3096576, while the sum is 58.

The spelling of 161837818618 in words is "one hundred sixty-one billion, eight hundred thirty-seven million, eight hundred eighteen thousand, six hundred eighteen".