1616057056161 has 20 divisors (see below), whose sum is σ = 2415372104772. Its totient is φ = 1076808083328.

The previous prime is 1616057056153. The next prime is 1616057056171. The reversal of 1616057056161 is 1616507506161.

1616057056161 is a `hidden beast` number, since 1 + 6 + 1 + 60 + 570 + 5 + 6 + 16 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1014540475536 + 601516580625 = 1007244^2 + 775575^2 .

It is not a de Polignac number, because 1616057056161 - 2³ = 1616057056153 is a prime.

It is a super-2 number, since 2×1616057056161² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1616057056171) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5059716 + ... + 5369621.

Almost surely, 2^{1616057056161} is an apocalyptic number.

It is an amenable number.

1616057056161 is a deficient number, since it is larger than the sum of its proper divisors (799315048611).

1616057056161 is a wasteful number, since it uses less digits than its factorization.

1616057056161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10431262 (or 10431253 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 45.

The spelling of 1616057056161 in words is "one trillion, six hundred sixteen billion, fifty-seven million, fifty-six thousand, one hundred sixty-one".