161277938 has 8 divisors (see below), whose sum is σ = 242084700. Its totient is φ = 80583040.

The previous prime is 161277913. The next prime is 161277953. The reversal of 161277938 is 839772161.

It can be written as a sum of positive squares in 2 ways, for example, as 151462249 + 9815689 = 12307^2 + 3133^2 .

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, 24263 + ... + 30186.

Almost surely, 2^161277938 is an apocalyptic number.

161277938 is a deficient number, since it is larger than the sum of its proper divisors (80806762).

161277938 is a wasteful number, since it uses less digits than its factorization.

161277938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55932.

The product of its digits is 127008, while the sum is 44.

The square root of 161277938 is about 12699.5251092314. The cubic root of 161277938 is about 544.3250494850.

The spelling of 161277938 in words is "one hundred sixty-one million, two hundred seventy-seven thousand, nine hundred thirty-eight".