161676103709 has 2 divisors, whose sum is σ = 161676103710. Its totient is φ = 161676103708.

The previous prime is 161676103703. The next prime is 161676103733. The reversal of 161676103709 is 907301676161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116137824100 + 45538279609 = 340790^2 + 213397^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161676103709 is a prime.

It is a super-2 number, since 2×161676103709² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161676103703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80838051854 + 80838051855.

It is an arithmetic number, because the mean of its divisors is an integer number (80838051855).

Almost surely, 2^161676103709 is an apocalyptic number.

It is an amenable number.

161676103709 is a deficient number, since it is larger than the sum of its proper divisors (1).

161676103709 is an equidigital number, since it uses as much as digits as its factorization.

161676103709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 285768, while the sum is 47.

The spelling of 161676103709 in words is "one hundred sixty-one billion, six hundred seventy-six million, one hundred three thousand, seven hundred nine".