64758308723 has 4 divisors (see below), whose sum is σ = 64759287888. Its totient is φ = 64757329560.

The previous prime is 64758308717. The next prime is 64758308737. The reversal of 64758308723 is 32780385746.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32780385746 = 2 ⋅16390192873.

It is a cyclic number.

It is not a de Polignac number, because 64758308723 - 2¹⁰ = 64758307699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64758308123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 382583 + ... + 525248.

It is an arithmetic number, because the mean of its divisors is an integer number (16189821972).

Almost surely, 2^64758308723 is an apocalyptic number.

64758308723 is a deficient number, since it is larger than the sum of its proper divisors (979165).

64758308723 is an equidigital number, since it uses as much as digits as its factorization.

64758308723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 979164.

The product of its (nonzero) digits is 6773760, while the sum is 53.

The spelling of 64758308723 in words is "sixty-four billion, seven hundred fifty-eight million, three hundred eight thousand, seven hundred twenty-three".