161159436247 has 2 divisors, whose sum is σ = 161159436248. Its totient is φ = 161159436246.

The previous prime is 161159436241. The next prime is 161159436323. The reversal of 161159436247 is 742634951161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161159436247 - 2³¹ = 159011952599 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161159436247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161159436241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80579718123 + 80579718124.

It is an arithmetic number, because the mean of its divisors is an integer number (80579718124).

Almost surely, 2^161159436247 is an apocalyptic number.

161159436247 is a deficient number, since it is larger than the sum of its proper divisors (1).

161159436247 is an equidigital number, since it uses as much as digits as its factorization.

161159436247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 49.

The spelling of 161159436247 in words is "one hundred sixty-one billion, one hundred fifty-nine million, four hundred thirty-six thousand, two hundred forty-seven".