161147724479 has 12 divisors (see below), whose sum is σ = 188428850784. Its totient is φ = 137410930944.

The previous prime is 161147724449. The next prime is 161147724497. The reversal of 161147724479 is 974427741161.

It is a happy number.

161147724479 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161147724479 - 2³² = 156852757183 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161147724479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161147724449) 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 11 ways as a sum of consecutive naturals, for example, 8510567 + ... + 8529480.

It is an arithmetic number, because the mean of its divisors is an integer number (15702404232).

Almost surely, 2^161147724479 is an apocalyptic number.

161147724479 is a deficient number, since it is larger than the sum of its proper divisors (27281126305).

161147724479 is a wasteful number, since it uses less digits than its factorization.

161147724479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17040254 (or 17040247 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 53.

The spelling of 161147724479 in words is "one hundred sixty-one billion, one hundred forty-seven million, seven hundred twenty-four thousand, four hundred seventy-nine".