161105494 has 16 divisors (see below), whose sum is σ = 263923920. Its totient is φ = 73147360.

The previous prime is 161105491. The next prime is 161105521. The reversal of 161105494 is 494501161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161105491) 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 7 ways as a sum of consecutive naturals, for example, 18672 + ... + 25900.

It is an arithmetic number, because the mean of its divisors is an integer number (16495245).

Almost surely, 2^161105494 is an apocalyptic number.

161105494 is a deficient number, since it is larger than the sum of its proper divisors (102818426).

161105494 is a wasteful number, since it uses less digits than its factorization.

161105494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8255.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 161105494 is about 12692.7339056643. The cubic root of 161105494 is about 544.1309765186.

The spelling of 161105494 in words is "one hundred sixty-one million, one hundred five thousand, four hundred ninety-four".