64056985 has 4 divisors (see below), whose sum is σ = 76868388. Its totient is φ = 51245584.

The previous prime is 64056983. The next prime is 64056991. The reversal of 64056985 is 58965046.

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 20602521 + 43454464 = 4539^2 + 6592^2 .

It is a cyclic number.

It is not a de Polignac number, because 64056985 - 2¹ = 64056983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64056983) 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, 6405694 + ... + 6405703.

It is an arithmetic number, because the mean of its divisors is an integer number (19217097).

Almost surely, 2^64056985 is an apocalyptic number.

It is an amenable number.

64056985 is a deficient number, since it is larger than the sum of its proper divisors (12811403).

64056985 is a wasteful number, since it uses less digits than its factorization.

64056985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12811402.

The product of its (nonzero) digits is 259200, while the sum is 43.

The square root of 64056985 is about 8003.5607700573. The cubic root of 64056985 is about 400.1186835321.

The spelling of 64056985 in words is "sixty-four million, fifty-six thousand, nine hundred eighty-five".