64846381 has 4 divisors (see below), whose sum is σ = 68660892. Its totient is φ = 61031872.

The previous prime is 64846367. The next prime is 64846403. The reversal of 64846381 is 18364846.

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 53890281 + 10956100 = 7341^2 + 3310^2 .

It is a cyclic number.

It is not a de Polignac number, because 64846381 - 2⁷ = 64846253 is a prime.

It is a super-2 number, since 2×64846381² = 8410106257594322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64846321) by changing a digit.

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, 1907230 + ... + 1907263.

It is an arithmetic number, because the mean of its divisors is an integer number (17165223).

Almost surely, 2^64846381 is an apocalyptic number.

It is an amenable number.

64846381 is a deficient number, since it is larger than the sum of its proper divisors (3814511).

64846381 is a wasteful number, since it uses less digits than its factorization.

64846381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3814510.

The product of its digits is 110592, while the sum is 40.

The square root of 64846381 is about 8052.7250667088. The cubic root of 64846381 is about 401.7555773480.

The spelling of 64846381 in words is "sixty-four million, eight hundred forty-six thousand, three hundred eighty-one".