161632580827 has 4 divisors (see below), whose sum is σ = 162344618856. Its totient is φ = 160920542800.

The previous prime is 161632580777. The next prime is 161632580843. The reversal of 161632580827 is 728085236161.

It is a happy number.

161632580827 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161632580827 is a prime.

It is a super-2 number, since 2×161632580827² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161632580867) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 356018674 + ... + 356019127.

It is an arithmetic number, because the mean of its divisors is an integer number (40586154714).

Almost surely, 2^161632580827 is an apocalyptic number.

161632580827 is a deficient number, since it is larger than the sum of its proper divisors (712038029).

161632580827 is an equidigital number, since it uses as much as digits as its factorization.

161632580827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712038028.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 161632580827 in words is "one hundred sixty-one billion, six hundred thirty-two million, five hundred eighty thousand, eight hundred twenty-seven".