64074181 has 4 divisors (see below), whose sum is σ = 64428364. Its totient is φ = 63720000.

The previous prime is 64074169. The next prime is 64074187. The reversal of 64074181 is 18147046.

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 14371681 + 49702500 = 3791^2 + 7050^2 .

It is a cyclic number.

It is not a de Polignac number, because 64074181 - 2⁵ = 64074149 is a prime.

It is a super-3 number, since 3×64074181³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64074187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176820 + ... + 177181.

It is an arithmetic number, because the mean of its divisors is an integer number (16107091).

Almost surely, 2^64074181 is an apocalyptic number.

It is an amenable number.

64074181 is a deficient number, since it is larger than the sum of its proper divisors (354183).

64074181 is a wasteful number, since it uses less digits than its factorization.

64074181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354182.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 64074181 is about 8004.6349698159. The cubic root of 64074181 is about 400.1544840790.

The spelling of 64074181 in words is "sixty-four million, seventy-four thousand, one hundred eighty-one".