64671601799 has 8 divisors (see below), whose sum is σ = 73914846720. Its totient is φ = 55429468056.

The previous prime is 64671601711. The next prime is 64671601817. The reversal of 64671601799 is 99710617646.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 64671601799 - 2²⁴ = 64654824583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64671601499) 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 7 ways as a sum of consecutive naturals, for example, 149099 + ... + 389324.

It is an arithmetic number, because the mean of its divisors is an integer number (9239355840).

Almost surely, 2^64671601799 is an apocalyptic number.

64671601799 is a deficient number, since it is larger than the sum of its proper divisors (9243244921).

64671601799 is a wasteful number, since it uses less digits than its factorization.

64671601799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555589.

The product of its (nonzero) digits is 3429216, while the sum is 56.

The spelling of 64671601799 in words is "sixty-four billion, six hundred seventy-one million, six hundred one thousand, seven hundred ninety-nine".