64046381 has 6 divisors (see below), whose sum is σ = 74502990. Its totient is φ = 54896856.

The previous prime is 64046347. The next prime is 64046399. The reversal of 64046381 is 18364046.

64046381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 50282281 + 13764100 = 7091^2 + 3710^2 .

It is a de Polignac number, because none of the positive numbers 2^k-64046381 is a prime.

It is a super-2 number, since 2×64046381² = 8203877838394322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64046581) 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 5 ways as a sum of consecutive naturals, for example, 653486 + ... + 653583.

It is an arithmetic number, because the mean of its divisors is an integer number (12417165).

Almost surely, 2^64046381 is an apocalyptic number.

It is an amenable number.

64046381 is a deficient number, since it is larger than the sum of its proper divisors (10456609).

64046381 is a wasteful number, since it uses less digits than its factorization.

64046381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1307083 (or 1307076 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 64046381 is about 8002.8982874956. The cubic root of 64046381 is about 400.0966037507.

The spelling of 64046381 in words is "sixty-four million, forty-six thousand, three hundred eighty-one".