64456685 has 8 divisors (see below), whose sum is σ = 78114456. Its totient is φ = 51054400.

The previous prime is 64456681. The next prime is 64456703. The reversal of 64456685 is 58665446.

It can be written as a sum of positive squares in 4 ways, for example, as 30316036 + 34140649 = 5506^2 + 5843^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64456685 - 2² = 64456681 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 (64456681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63314 + ... + 64323.

It is an arithmetic number, because the mean of its divisors is an integer number (9764307).

Almost surely, 2^64456685 is an apocalyptic number.

It is an amenable number.

64456685 is a deficient number, since it is larger than the sum of its proper divisors (13657771).

64456685 is a wasteful number, since it uses less digits than its factorization.

64456685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127743.

The product of its digits is 691200, while the sum is 44.

The square root of 64456685 is about 8028.4920751035. The cubic root of 64456685 is about 400.9491729784.

The spelling of 64456685 in words is "sixty-four million, four hundred fifty-six thousand, six hundred eighty-five".