64520076323 has 4 divisors (see below), whose sum is σ = 64520663208. Its totient is φ = 64519489440.

The previous prime is 64520076287. The next prime is 64520076331. The reversal of 64520076323 is 32367002546.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 64520076323 - 2¹⁴ = 64520059939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64520076373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73673 + ... + 366698.

It is an arithmetic number, because the mean of its divisors is an integer number (16130165802).

Almost surely, 2^64520076323 is an apocalyptic number.

64520076323 is a deficient number, since it is larger than the sum of its proper divisors (586885).

64520076323 is a wasteful number, since it uses less digits than its factorization.

64520076323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586884.

The product of its (nonzero) digits is 181440, while the sum is 38.

Adding to 64520076323 its reverse (32367002546), we get a palindrome (96887078869).

The spelling of 64520076323 in words is "sixty-four billion, five hundred twenty million, seventy-six thousand, three hundred twenty-three".