64117445217 has 16 divisors (see below), whose sum is σ = 97715560320. Its totient is φ = 36633745152.

The previous prime is 64117445083. The next prime is 64117445221. The reversal of 64117445217 is 71254471146.

It is not a de Polignac number, because 64117445217 - 2¹⁶ = 64117379681 is a prime.

It is a super-2 number, since 2×64117445217² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64117445317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32242 + ... + 359547.

It is an arithmetic number, because the mean of its divisors is an integer number (6107222520).

Almost surely, 2^64117445217 is an apocalyptic number.

It is an amenable number.

64117445217 is a deficient number, since it is larger than the sum of its proper divisors (33598115103).

64117445217 is a wasteful number, since it uses less digits than its factorization.

64117445217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399592.

The product of its digits is 188160, while the sum is 42.

The spelling of 64117445217 in words is "sixty-four billion, one hundred seventeen million, four hundred forty-five thousand, two hundred seventeen".