164561277 has 8 divisors (see below), whose sum is σ = 220813216. Its totient is φ = 109008432.

The previous prime is 164561273. The next prime is 164561281. The reversal of 164561277 is 772165461.

It is an interprime number because it is at equal distance from previous prime (164561273) and next prime (164561281).

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

It is not a de Polignac number, because 164561277 - 2² = 164561273 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164561273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174223 + ... + 175164.

It is an arithmetic number, because the mean of its divisors is an integer number (27601652).

Almost surely, 2^164561277 is an apocalyptic number.

It is an amenable number.

164561277 is a deficient number, since it is larger than the sum of its proper divisors (56251939).

164561277 is a wasteful number, since it uses less digits than its factorization.

164561277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349547.

The product of its digits is 70560, while the sum is 39.

The square root of 164561277 is about 12828.1439421297. The cubic root of 164561277 is about 547.9941003592.

The spelling of 164561277 in words is "one hundred sixty-four million, five hundred sixty-one thousand, two hundred seventy-seven".