161758716033 has 4 divisors (see below), whose sum is σ = 215678288048. Its totient is φ = 107839144020.

The previous prime is 161758715983. The next prime is 161758716061. The reversal of 161758716033 is 330617857161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 161758716033 - 2¹⁷ = 161758584961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161758726033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26959786003 + ... + 26959786008.

It is an arithmetic number, because the mean of its divisors is an integer number (53919572012).

Almost surely, 2^161758716033 is an apocalyptic number.

It is an amenable number.

161758716033 is a deficient number, since it is larger than the sum of its proper divisors (53919572015).

161758716033 is an equidigital number, since it uses as much as digits as its factorization.

161758716033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53919572014.

The product of its (nonzero) digits is 635040, while the sum is 48.

The spelling of 161758716033 in words is "one hundred sixty-one billion, seven hundred fifty-eight million, seven hundred sixteen thousand, thirty-three".