161109419586 has 32 divisors (see below), whose sum is σ = 327575867136. Its totient is φ = 52810704000.

The previous prime is 161109419567. The next prime is 161109419587. The reversal of 161109419586 is 685914901161.

It is a super-2 number, since 2×161109419586² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161109419587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1632366 + ... + 1728246.

It is an arithmetic number, because the mean of its divisors is an integer number (10236745848).

Almost surely, 2^161109419586 is an apocalyptic number.

161109419586 is an abundant number, since it is smaller than the sum of its proper divisors (166466447550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161109419586 is a wasteful number, since it uses less digits than its factorization.

161109419586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100538.

The product of its (nonzero) digits is 466560, while the sum is 51.

The spelling of 161109419586 in words is "one hundred sixty-one billion, one hundred nine million, four hundred nineteen thousand, five hundred eighty-six".