161632324618 has 8 divisors (see below), whose sum is σ = 242494586820. Its totient is φ = 80800795680.

The previous prime is 161632324597. The next prime is 161632324619. The reversal of 161632324618 is 816423236161.

It can be written as a sum of positive squares in 2 ways, for example, as 140522268769 + 21110055849 = 374863^2 + 145293^2 .

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

It is a super-2 number, since 2×161632324618² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161632324619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7670163 + ... + 7691206.

Almost surely, 2^161632324618 is an apocalyptic number.

161632324618 is a deficient number, since it is larger than the sum of its proper divisors (80862262202).

161632324618 is a wasteful number, since it uses less digits than its factorization.

161632324618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15366632.

The product of its digits is 248832, while the sum is 43.

The spelling of 161632324618 in words is "one hundred sixty-one billion, six hundred thirty-two million, three hundred twenty-four thousand, six hundred eighteen".