64781017 has 8 divisors (see below), whose sum is σ = 74111936. Its totient is φ = 55469232.

The previous prime is 64781011. The next prime is 64781021. The reversal of 64781017 is 71018746.

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

It is not a de Polignac number, because 64781017 - 2¹⁵ = 64748249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64781011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3418 + ... + 11884.

It is an arithmetic number, because the mean of its divisors is an integer number (9263992).

Almost surely, 2^64781017 is an apocalyptic number.

It is an amenable number.

64781017 is a deficient number, since it is larger than the sum of its proper divisors (9330919).

64781017 is a wasteful number, since it uses less digits than its factorization.

64781017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9567.

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 64781017 is about 8048.6655415665. The cubic root of 64781017 is about 401.6205444727.

The spelling of 64781017 in words is "sixty-four million, seven hundred eighty-one thousand, seventeen".