161011016016061 has 2 divisors, whose sum is σ = 161011016016062. Its totient is φ = 161011016016060.

The previous prime is 161011016016047. The next prime is 161011016016077. The reversal of 161011016016061 is 160610610110161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160563896447161 + 447119568900 = 12671381^2 + 668670^2 .

It is a cyclic number.

It is not a de Polignac number, because 161011016016061 - 2²⁵ = 161010982461629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161011016016041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80505508008030 + 80505508008031.

It is an arithmetic number, because the mean of its divisors is an integer number (80505508008031).

Almost surely, 2^{161011016016061} is an apocalyptic number.

It is an amenable number.

161011016016061 is a deficient number, since it is larger than the sum of its proper divisors (1).

161011016016061 is an equidigital number, since it uses as much as digits as its factorization.

161011016016061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 31.

The spelling of 161011016016061 in words is "one hundred sixty-one trillion, eleven billion, sixteen million, sixteen thousand, sixty-one".