64381061 has 4 divisors (see below), whose sum is σ = 65595852. Its totient is φ = 63166272.

The previous prime is 64381039. The next prime is 64381067. The reversal of 64381061 is 16018346.

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 19088161 + 45292900 = 4369^2 + 6730^2 .

It is a cyclic number.

It is not a de Polignac number, because 64381061 - 2²² = 60186757 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 (64381067) 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, 607316 + ... + 607421.

It is an arithmetic number, because the mean of its divisors is an integer number (16398963).

Almost surely, 2^64381061 is an apocalyptic number.

It is an amenable number.

64381061 is a deficient number, since it is larger than the sum of its proper divisors (1214791).

64381061 is a wasteful number, since it uses less digits than its factorization.

64381061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214790.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 64381061 is about 8023.7809666017. The cubic root of 64381061 is about 400.7923066725.

The spelling of 64381061 in words is "sixty-four million, three hundred eighty-one thousand, sixty-one".