161616018759 has 32 divisors (see below), whose sum is σ = 243407109120. Its totient is φ = 94709077632.

The previous prime is 161616018749. The next prime is 161616018799. The reversal of 161616018759 is 957810616161.

It is a happy number.

It is not a de Polignac number, because 161616018759 - 2⁷ = 161616018631 is a prime.

It is a super-2 number, since 2×161616018759² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161616018749) 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 31 ways as a sum of consecutive naturals, for example, 1123669 + ... + 1259310.

It is an arithmetic number, because the mean of its divisors is an integer number (7606472160).

Almost surely, 2^161616018759 is an apocalyptic number.

161616018759 is a deficient number, since it is larger than the sum of its proper divisors (81791090361).

161616018759 is a wasteful number, since it uses less digits than its factorization.

161616018759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2383079.

The product of its (nonzero) digits is 544320, while the sum is 51.

The spelling of 161616018759 in words is "one hundred sixty-one billion, six hundred sixteen million, eighteen thousand, seven hundred fifty-nine".