161545222274 has 8 divisors (see below), whose sum is σ = 250673620860. Its totient is φ = 77987348656.

The previous prime is 161545222217. The next prime is 161545222301. The reversal of 161545222274 is 472222545161.

It can be written as a sum of positive squares in 2 ways, for example, as 157535166649 + 4010055625 = 396907^2 + 63325^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 in 3 ways as a sum of consecutive naturals, for example, 1392631169 + ... + 1392631284.

Almost surely, 2^161545222274 is an apocalyptic number.

161545222274 is a deficient number, since it is larger than the sum of its proper divisors (89128398586).

161545222274 is a wasteful number, since it uses less digits than its factorization.

161545222274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2785262484.

The product of its digits is 268800, while the sum is 41.

The spelling of 161545222274 in words is "one hundred sixty-one billion, five hundred forty-five million, two hundred twenty-two thousand, two hundred seventy-four".