161157559 has 2 divisors, whose sum is σ = 161157560. Its totient is φ = 161157558.

The previous prime is 161157523. The next prime is 161157583. The reversal of 161157559 is 955751161.

It is a strong prime.

It is an emirp because it is prime and its reverse (955751161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161157559 - 2⁷ = 161157431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161157589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80578779 + 80578780.

It is an arithmetic number, because the mean of its divisors is an integer number (80578780).

Almost surely, 2^161157559 is an apocalyptic number.

161157559 is a deficient number, since it is larger than the sum of its proper divisors (1).

161157559 is an equidigital number, since it uses as much as digits as its factorization.

161157559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47250, while the sum is 40.

The square root of 161157559 is about 12694.7847165677. The cubic root of 161157559 is about 544.1895864130.

The spelling of 161157559 in words is "one hundred sixty-one million, one hundred fifty-seven thousand, five hundred fifty-nine".