161433965377 has 2 divisors, whose sum is σ = 161433965378. Its totient is φ = 161433965376.

The previous prime is 161433965347. The next prime is 161433965383. The reversal of 161433965377 is 773569334161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161231159296 + 202806081 = 401536^2 + 14241^2 .

It is a cyclic number.

It is not a de Polignac number, because 161433965377 - 2¹⁹ = 161433441089 is a prime.

It is not a weakly prime, because it can be changed into another prime (161433965327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80716982688 + 80716982689.

It is an arithmetic number, because the mean of its divisors is an integer number (80716982689).

Almost surely, 2^161433965377 is an apocalyptic number.

It is an amenable number.

161433965377 is a deficient number, since it is larger than the sum of its proper divisors (1).

161433965377 is an equidigital number, since it uses as much as digits as its factorization.

161433965377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8573040, while the sum is 55.

The spelling of 161433965377 in words is "one hundred sixty-one billion, four hundred thirty-three million, nine hundred sixty-five thousand, three hundred seventy-seven".