161914885474 has 4 divisors (see below), whose sum is σ = 242872328214. Its totient is φ = 80957442736.

The previous prime is 161914885469. The next prime is 161914885547. The reversal of 161914885474 is 474588419161.

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

It can be written as a sum of positive squares in only one way, i.e., 106481479225 + 55433406249 = 326315^2 + 235443^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40478721367 + ... + 40478721370.

Almost surely, 2^161914885474 is an apocalyptic number.

161914885474 is a deficient number, since it is larger than the sum of its proper divisors (80957442740).

161914885474 is an equidigital number, since it uses as much as digits as its factorization.

161914885474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80957442739.

The product of its digits is 7741440, while the sum is 58.

The spelling of 161914885474 in words is "one hundred sixty-one billion, nine hundred fourteen million, eight hundred eighty-five thousand, four hundred seventy-four".