64768635 has 24 divisors (see below), whose sum is σ = 113624784. Its totient is φ = 34125120.

The previous prime is 64768631. The next prime is 64768651. The reversal of 64768635 is 53686746.

64768635 is a `hidden beast` number, since 6 + 4 + 7 + 6 + 8 + 635 = 666.

It is not a de Polignac number, because 64768635 - 2² = 64768631 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (64768631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4936 + ... + 12405.

It is an arithmetic number, because the mean of its divisors is an integer number (4734366).

Almost surely, 2^64768635 is an apocalyptic number.

64768635 is a deficient number, since it is larger than the sum of its proper divisors (48856149).

64768635 is a wasteful number, since it uses less digits than its factorization.

64768635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17435 (or 17432 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 64768635 is about 8047.8963089742. The cubic root of 64768635 is about 401.5949547621.

The spelling of 64768635 in words is "sixty-four million, seven hundred sixty-eight thousand, six hundred thirty-five".