64484081817 has 16 divisors (see below), whose sum is σ = 92211600960. Its totient is φ = 39958356672.

The previous prime is 64484081807. The next prime is 64484081819. The reversal of 64484081817 is 71818048446.

It is not a de Polignac number, because 64484081817 - 2⁷ = 64484081689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64484081817.

It is not an unprimeable number, because it can be changed into a prime (64484081819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10669618 + ... + 10675659.

It is an arithmetic number, because the mean of its divisors is an integer number (5763225060).

Almost surely, 2^64484081817 is an apocalyptic number.

It is an amenable number.

64484081817 is a deficient number, since it is larger than the sum of its proper divisors (27727519143).

64484081817 is a wasteful number, since it uses less digits than its factorization.

64484081817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21345352.

The product of its (nonzero) digits is 1376256, while the sum is 51.

The spelling of 64484081817 in words is "sixty-four billion, four hundred eighty-four million, eighty-one thousand, eight hundred seventeen".