64501997946326 has 8 divisors (see below), whose sum is σ = 97186866861504. Its totient is φ = 32106375659160.

The previous prime is 64501997946319. The next prime is 64501997946329. The reversal of 64501997946326 is 62364979910546.

64501997946326 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 64501997946326.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64501997946329) 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, 72311656445 + ... + 72311657336.

It is an arithmetic number, because the mean of its divisors is an integer number (12148358357688).

Almost surely, 2^{64501997946326} is an apocalyptic number.

64501997946326 is a deficient number, since it is larger than the sum of its proper divisors (32684868915178).

64501997946326 is a wasteful number, since it uses less digits than its factorization.

64501997946326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144623314006.

The product of its (nonzero) digits is 529079040, while the sum is 71.

The spelling of 64501997946326 in words is "sixty-four trillion, five hundred one billion, nine hundred ninety-seven million, nine hundred forty-six thousand, three hundred twenty-six".