64381745 has 4 divisors (see below), whose sum is σ = 77258100. Its totient is φ = 51505392.

The previous prime is 64381729. The next prime is 64381763. The reversal of 64381745 is 54718346.

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 14876449 + 49505296 = 3857^2 + 7036^2 .

It is a cyclic number.

It is not a de Polignac number, because 64381745 - 2⁴ = 64381729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64381699 and 64381708.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6438170 + ... + 6438179.

It is an arithmetic number, because the mean of its divisors is an integer number (19314525).

Almost surely, 2^64381745 is an apocalyptic number.

It is an amenable number.

64381745 is a deficient number, since it is larger than the sum of its proper divisors (12876355).

64381745 is a wasteful number, since it uses less digits than its factorization.

64381745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12876354.

The product of its digits is 80640, while the sum is 38.

The square root of 64381745 is about 8023.8235897856. The cubic root of 64381745 is about 400.7937260390.

The spelling of 64381745 in words is "sixty-four million, three hundred eighty-one thousand, seven hundred forty-five".