64649786 has 8 divisors (see below), whose sum is σ = 97833204. Its totient is φ = 32038720.

The previous prime is 64649773. The next prime is 64649791. The reversal of 64649786 is 68794646.

It can be written as a sum of positive squares in 2 ways, for example, as 57988225 + 6661561 = 7615^2 + 2581^2 .

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

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, 142805 + ... + 143256.

Almost surely, 2^64649786 is an apocalyptic number.

64649786 is a deficient number, since it is larger than the sum of its proper divisors (33183418).

64649786 is a wasteful number, since it uses less digits than its factorization.

64649786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286176.

The product of its digits is 1741824, while the sum is 50.

The square root of 64649786 is about 8040.5090634860. The cubic root of 64649786 is about 401.3491651009.

The spelling of 64649786 in words is "sixty-four million, six hundred forty-nine thousand, seven hundred eighty-six".