161137321979 has 2 divisors, whose sum is σ = 161137321980. Its totient is φ = 161137321978.

The previous prime is 161137321963. The next prime is 161137322081. The reversal of 161137321979 is 979123731161.

161137321979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161137321979 - 2⁴ = 161137321963 is a prime.

It is not a weakly prime, because it can be changed into another prime (161137320979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80568660989 + 80568660990.

It is an arithmetic number, because the mean of its divisors is an integer number (80568660990).

Almost surely, 2^161137321979 is an apocalyptic number.

161137321979 is a deficient number, since it is larger than the sum of its proper divisors (1).

161137321979 is an equidigital number, since it uses as much as digits as its factorization.

161137321979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 428652, while the sum is 50.

The spelling of 161137321979 in words is "one hundred sixty-one billion, one hundred thirty-seven million, three hundred twenty-one thousand, nine hundred seventy-nine".