64916817 has 24 divisors (see below), whose sum is σ = 103152672. Its totient is φ = 36187200.

The previous prime is 64916809. The next prime is 64916827. The reversal of 64916817 is 71861946.

It is not a de Polignac number, because 64916817 - 2³ = 64916809 is a prime.

It is a super-2 number, since 2×64916817² = 8428386258822978, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64916807) 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, 642 + ... + 11412.

It is an arithmetic number, because the mean of its divisors is an integer number (4298028).

Almost surely, 2^64916817 is an apocalyptic number.

It is an amenable number.

64916817 is a deficient number, since it is larger than the sum of its proper divisors (38235855).

64916817 is a wasteful number, since it uses less digits than its factorization.

64916817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10829 (or 10822 counting only the distinct ones).

The product of its digits is 72576, while the sum is 42.

The square root of 64916817 is about 8057.0973061022. The cubic root of 64916817 is about 401.9009867285.

The spelling of 64916817 in words is "sixty-four million, nine hundred sixteen thousand, eight hundred seventeen".