161340011506 has 16 divisors (see below), whose sum is σ = 242277346080. Its totient is φ = 80580938400.

The previous prime is 161340011501. The next prime is 161340011617. The reversal of 161340011506 is 605110043161.

161340011506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (161340011501) 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 7 ways as a sum of consecutive naturals, for example, 10192510 + ... + 10208326.

It is an arithmetic number, because the mean of its divisors is an integer number (15142334130).

Almost surely, 2^161340011506 is an apocalyptic number.

161340011506 is a deficient number, since it is larger than the sum of its proper divisors (80937334574).

161340011506 is a wasteful number, since it uses less digits than its factorization.

161340011506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21129.

The product of its (nonzero) digits is 2160, while the sum is 28.

Adding to 161340011506 its reverse (605110043161), we get a palindrome (766450054667).

The spelling of 161340011506 in words is "one hundred sixty-one billion, three hundred forty million, eleven thousand, five hundred six".