161376680669 has 2 divisors, whose sum is σ = 161376680670. Its totient is φ = 161376680668.

The previous prime is 161376680629. The next prime is 161376680681. The reversal of 161376680669 is 966086673161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157976041444 + 3400639225 = 397462^2 + 58315^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161376680669 is a prime.

It is a super-2 number, since 2×161376680669² (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 (161376680629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80688340334 + 80688340335.

It is an arithmetic number, because the mean of its divisors is an integer number (80688340335).

Almost surely, 2^161376680669 is an apocalyptic number.

It is an amenable number.

161376680669 is a deficient number, since it is larger than the sum of its proper divisors (1).

161376680669 is an equidigital number, since it uses as much as digits as its factorization.

161376680669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11757312, while the sum is 59.

The spelling of 161376680669 in words is "one hundred sixty-one billion, three hundred seventy-six million, six hundred eighty thousand, six hundred sixty-nine".