64745857 has 8 divisors (see below), whose sum is σ = 70943040. Its totient is φ = 58600560.

The previous prime is 64745771. The next prime is 64745869. The reversal of 64745857 is 75854746.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64745857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64745357) 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, 10333 + ... + 15370.

It is an arithmetic number, because the mean of its divisors is an integer number (8867880).

Almost surely, 2^64745857 is an apocalyptic number.

It is an amenable number.

64745857 is a deficient number, since it is larger than the sum of its proper divisors (6197183).

64745857 is a wasteful number, since it uses less digits than its factorization.

64745857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25943.

The product of its digits is 940800, while the sum is 46.

The square root of 64745857 is about 8046.4810321034. The cubic root of 64745857 is about 401.5478712603.

Subtracting 64745857 from its reverse (75854746), we obtain a square (11108889 = 3333²).

The spelling of 64745857 in words is "sixty-four million, seven hundred forty-five thousand, eight hundred fifty-seven".