161367659819 has 2 divisors, whose sum is σ = 161367659820. Its totient is φ = 161367659818.

The previous prime is 161367659767. The next prime is 161367659857. The reversal of 161367659819 is 918956763161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161367659819 - 2¹² = 161367655723 is a prime.

It is a super-2 number, since 2×161367659819² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161367655819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80683829909 + 80683829910.

It is an arithmetic number, because the mean of its divisors is an integer number (80683829910).

Almost surely, 2^161367659819 is an apocalyptic number.

161367659819 is a deficient number, since it is larger than the sum of its proper divisors (1).

161367659819 is an equidigital number, since it uses as much as digits as its factorization.

161367659819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14696640, while the sum is 62.

The spelling of 161367659819 in words is "one hundred sixty-one billion, three hundred sixty-seven million, six hundred fifty-nine thousand, eight hundred nineteen".