64201680671 has 4 divisors (see below), whose sum is σ = 64205550744. Its totient is φ = 64197810600.

The previous prime is 64201680623. The next prime is 64201680721. The reversal of 64201680671 is 17608610246.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17608610246 = 2 ⋅8804305123.

It is a cyclic number.

It is not a de Polignac number, because 64201680671 - 2³⁰ = 63127938847 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 (64201685671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1910045 + ... + 1943366.

It is an arithmetic number, because the mean of its divisors is an integer number (16051387686).

Almost surely, 2^64201680671 is an apocalyptic number.

64201680671 is a deficient number, since it is larger than the sum of its proper divisors (3870073).

64201680671 is a wasteful number, since it uses less digits than its factorization.

64201680671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3870072.

The product of its (nonzero) digits is 96768, while the sum is 41.

The spelling of 64201680671 in words is "sixty-four billion, two hundred one million, six hundred eighty thousand, six hundred seventy-one".