161111206579 has 2 divisors, whose sum is σ = 161111206580. Its totient is φ = 161111206578.

The previous prime is 161111206537. The next prime is 161111206637. The reversal of 161111206579 is 975602111161.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161111206579 - 2¹¹ = 161111204531 is a prime.

It is not a weakly prime, because it can be changed into another prime (161111203579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80555603289 + 80555603290.

It is an arithmetic number, because the mean of its divisors is an integer number (80555603290).

Almost surely, 2^161111206579 is an apocalyptic number.

161111206579 is a deficient number, since it is larger than the sum of its proper divisors (1).

161111206579 is an equidigital number, since it uses as much as digits as its factorization.

161111206579 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 40.

The spelling of 161111206579 in words is "one hundred sixty-one billion, one hundred eleven million, two hundred six thousand, five hundred seventy-nine".