161219476 has 24 divisors (see below), whose sum is σ = 308206080. Its totient is φ = 73180800.

The previous prime is 161219459. The next prime is 161219477. The reversal of 161219476 is 674912161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161219477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36685 + ... + 40843.

It is an arithmetic number, because the mean of its divisors is an integer number (12841920).

Almost surely, 2^161219476 is an apocalyptic number.

It is an amenable number.

161219476 is a deficient number, since it is larger than the sum of its proper divisors (146986604).

161219476 is a wasteful number, since it uses less digits than its factorization.

161219476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5055 (or 5053 counting only the distinct ones).

The product of its digits is 18144, while the sum is 37.

The square root of 161219476 is about 12697.2231609908. The cubic root of 161219476 is about 544.2592703352.

The spelling of 161219476 in words is "one hundred sixty-one million, two hundred nineteen thousand, four hundred seventy-six".