164761481 has 4 divisors (see below), whose sum is σ = 169214532. Its totient is φ = 160308432.

The previous prime is 164761477. The next prime is 164761507. The reversal of 164761481 is 184167461.

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

It can be written as a sum of positive squares in 2 ways, for example, as 132043081 + 32718400 = 11491^2 + 5720^2 .

It is a cyclic number.

It is not a de Polignac number, because 164761481 - 2² = 164761477 is a prime.

It is a super-2 number, since 2×164761481² = 54292691242626722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164761381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2226470 + ... + 2226543.

It is an arithmetic number, because the mean of its divisors is an integer number (42303633).

Almost surely, 2^164761481 is an apocalyptic number.

It is an amenable number.

164761481 is a deficient number, since it is larger than the sum of its proper divisors (4453051).

164761481 is an equidigital number, since it uses as much as digits as its factorization.

164761481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4453050.

The product of its digits is 32256, while the sum is 38.

The square root of 164761481 is about 12835.9448814647. The cubic root of 164761481 is about 548.2162387866.

The spelling of 164761481 in words is "one hundred sixty-four million, seven hundred sixty-one thousand, four hundred eighty-one".