64381445 has 16 divisors (see below), whose sum is σ = 78624000. Its totient is φ = 50601408.

The previous prime is 64381441. The next prime is 64381453. The reversal of 64381445 is 54418346.

It is a cyclic number.

It is not a de Polignac number, because 64381445 - 2² = 64381441 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64381441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153446 + ... + 153864.

It is an arithmetic number, because the mean of its divisors is an integer number (4914000).

Almost surely, 2^64381445 is an apocalyptic number.

It is an amenable number.

64381445 is a deficient number, since it is larger than the sum of its proper divisors (14242555).

64381445 is a wasteful number, since it uses less digits than its factorization.

64381445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892.

The product of its digits is 46080, while the sum is 35.

The square root of 64381445 is about 8023.8048954346. The cubic root of 64381445 is about 400.7931035111.

The spelling of 64381445 in words is "sixty-four million, three hundred eighty-one thousand, four hundred forty-five".