64718851 has 4 divisors (see below), whose sum is σ = 65684872. Its totient is φ = 63752832.

The previous prime is 64718839. The next prime is 64718861. The reversal of 64718851 is 15881746.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64718851 - 2¹¹ = 64716803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64718831) 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, 482910 + ... + 483043.

It is an arithmetic number, because the mean of its divisors is an integer number (16421218).

Almost surely, 2^64718851 is an apocalyptic number.

64718851 is a deficient number, since it is larger than the sum of its proper divisors (966021).

64718851 is an equidigital number, since it uses as much as digits as its factorization.

64718851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966020.

The product of its digits is 53760, while the sum is 40.

The square root of 64718851 is about 8044.8027321992. The cubic root of 64718851 is about 401.4920339172.

The spelling of 64718851 in words is "sixty-four million, seven hundred eighteen thousand, eight hundred fifty-one".