161803650769 has 2 divisors, whose sum is σ = 161803650770. Its totient is φ = 161803650768.

The previous prime is 161803650727. The next prime is 161803650829. The reversal of 161803650769 is 967056308161.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88613382400 + 73190268369 = 297680^2 + 270537^2 .

It is a cyclic number.

It is not a de Polignac number, because 161803650769 - 2⁹ = 161803650257 is a prime.

It is a super-2 number, since 2×161803650769² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161803650469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80901825384 + 80901825385.

It is an arithmetic number, because the mean of its divisors is an integer number (80901825385).

Almost surely, 2^161803650769 is an apocalyptic number.

It is an amenable number.

161803650769 is a deficient number, since it is larger than the sum of its proper divisors (1).

161803650769 is an equidigital number, since it uses as much as digits as its factorization.

161803650769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 161803650769 in words is "one hundred sixty-one billion, eight hundred three million, six hundred fifty thousand, seven hundred sixty-nine".