1616161616164 has 24 divisors (see below), whose sum is σ = 2944761507576. Its totient is φ = 775447392000.

The previous prime is 1616161616143. The next prime is 1616161616227. The reversal of 1616161616164 is 4616161616161.

It can be written as a sum of positive squares in 4 ways, for example, as 177121456164 + 1439040160000 = 420858^2 + 1199600^2 .

It is a super-2 number, since 2×1616161616164² (a number of 25 digits) contains 22 as substring.

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 in 7 ways as a sum of consecutive naturals, for example, 80765767 + ... + 80785774.

It is an arithmetic number, because the mean of its divisors is an integer number (122698396149).

Almost surely, 2^{1616161616164} is an apocalyptic number.

It is an amenable number.

1616161616164 is a deficient number, since it is larger than the sum of its proper divisors (1328599891412).

1616161616164 is a wasteful number, since it uses less digits than its factorization.

1616161616164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161551647 (or 161551645 counting only the distinct ones).

The product of its digits is 186624, while the sum is 46.

The spelling of 1616161616164 in words is "one trillion, six hundred sixteen billion, one hundred sixty-one million, six hundred sixteen thousand, one hundred sixty-four".