64523785 has 16 divisors (see below), whose sum is σ = 78886080. Its totient is φ = 50656320.

The previous prime is 64523777. The next prime is 64523801. The reversal of 64523785 is 58732546.

It is not a de Polignac number, because 64523785 - 2³ = 64523777 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74686 + ... + 75544.

It is an arithmetic number, because the mean of its divisors is an integer number (4930380).

Almost surely, 2^64523785 is an apocalyptic number.

It is an amenable number.

64523785 is a deficient number, since it is larger than the sum of its proper divisors (14362295).

64523785 is a wasteful number, since it uses less digits than its factorization.

64523785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128.

The product of its digits is 201600, while the sum is 40.

The square root of 64523785 is about 8032.6698550357. The cubic root of 64523785 is about 401.0882553159.

The spelling of 64523785 in words is "sixty-four million, five hundred twenty-three thousand, seven hundred eighty-five".