161505610982 has 4 divisors (see below), whose sum is σ = 242258416476. Its totient is φ = 80752805490.

The previous prime is 161505610967. The next prime is 161505611021. The reversal of 161505610982 is 289016505161.

161505610982 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 congruent number.

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 as a sum of consecutive naturals, namely, 40376402744 + ... + 40376402747.

It is an arithmetic number, because the mean of its divisors is an integer number (60564604119).

Almost surely, 2^161505610982 is an apocalyptic number.

161505610982 is a deficient number, since it is larger than the sum of its proper divisors (80752805494).

161505610982 is an equidigital number, since it uses as much as digits as its factorization.

161505610982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80752805493.

The product of its (nonzero) digits is 129600, while the sum is 44.

The spelling of 161505610982 in words is "one hundred sixty-one billion, five hundred five million, six hundred ten thousand, nine hundred eighty-two".