161616211346061 has 24 divisors (see below), whose sum is σ = 247178247136704. Its totient is φ = 101406040149120.

The previous prime is 161616211346053. The next prime is 161616211346063. The reversal of 161616211346061 is 160643112616161.

161616211346061 is a `hidden beast` number, since 1 + 6 + 1 + 6 + 1 + 6 + 2 + 1 + 1 + 34 + 606 + 1 = 666.

161616211346061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161616211346061 - 2³ = 161616211346053 is a prime.

It is a super-2 number, since 2×161616211346061² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161616211345998 and 161616211346016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161616211346063) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 109202656 + ... + 110672726.

It is an arithmetic number, because the mean of its divisors is an integer number (10299093630696).

Almost surely, 2^{161616211346061} is an apocalyptic number.

It is an amenable number.

161616211346061 is a deficient number, since it is larger than the sum of its proper divisors (85562035790643).

161616211346061 is a wasteful number, since it uses less digits than its factorization.

161616211346061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2188641 (or 2188638 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 161616211346061 in words is "one hundred sixty-one trillion, six hundred sixteen billion, two hundred eleven million, three hundred forty-six thousand, sixty-one".