64746216767 has 4 divisors (see below), whose sum is σ = 64825080216. Its totient is φ = 64667353320.

The previous prime is 64746216739. The next prime is 64746216791. The reversal of 64746216767 is 76761264746.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64746216767 - 2¹⁶ = 64746151231 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 (64746216737) 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, 39430493 + ... + 39432134.

It is an arithmetic number, because the mean of its divisors is an integer number (16206270054).

Almost surely, 2^64746216767 is an apocalyptic number.

64746216767 is a deficient number, since it is larger than the sum of its proper divisors (78863449).

64746216767 is an equidigital number, since it uses as much as digits as its factorization.

64746216767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78863448.

The product of its digits is 14224896, while the sum is 56.

The spelling of 64746216767 in words is "sixty-four billion, seven hundred forty-six million, two hundred sixteen thousand, seven hundred sixty-seven".