64223795539421 has 8 divisors (see below), whose sum is σ = 73778927223744. Its totient is φ = 54763739792640.

The previous prime is 64223795539417. The next prime is 64223795539441. The reversal of 64223795539421 is 12493559732246.

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

It is a cyclic number.

It is not a de Polignac number, because 64223795539421 - 2² = 64223795539417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64223795539441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23768982935 + ... + 23768985636.

It is an arithmetic number, because the mean of its divisors is an integer number (9222365902968).

Almost surely, 2^{64223795539421} is an apocalyptic number.

It is an amenable number.

64223795539421 is a deficient number, since it is larger than the sum of its proper divisors (9555131684323).

64223795539421 is a wasteful number, since it uses less digits than its factorization.

64223795539421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47537968771.

The product of its digits is 97977600, while the sum is 62.

The spelling of 64223795539421 in words is "sixty-four trillion, two hundred twenty-three billion, seven hundred ninety-five million, five hundred thirty-nine thousand, four hundred twenty-one".