161349770047 has 4 divisors (see below), whose sum is σ = 161571709936. Its totient is φ = 161127830160.

The previous prime is 161349770033. The next prime is 161349770051. The reversal of 161349770047 is 740077943161.

161349770047 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161349770047 - 2¹⁵ = 161349737279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161349770077) 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 in 3 ways as a sum of consecutive naturals, for example, 110968854 + ... + 110970307.

It is an arithmetic number, because the mean of its divisors is an integer number (40392927484).

Almost surely, 2^161349770047 is an apocalyptic number.

161349770047 is a deficient number, since it is larger than the sum of its proper divisors (221939889).

161349770047 is an equidigital number, since it uses as much as digits as its factorization.

161349770047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221939888.

The product of its (nonzero) digits is 889056, while the sum is 49.

The spelling of 161349770047 in words is "one hundred sixty-one billion, three hundred forty-nine million, seven hundred seventy thousand, forty-seven".