64146721327 has 8 divisors (see below), whose sum is σ = 70948141376. Its totient is φ = 57612023712.

The previous prime is 64146721321. The next prime is 64146721337. The reversal of 64146721327 is 72312764146.

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 64146721327 - 2³⁵ = 29786982959 is a prime.

It is a super-2 number, since 2×64146721327² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64146721321) 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, 66680103 + ... + 66681064.

It is an arithmetic number, because the mean of its divisors is an integer number (8868517672).

Almost surely, 2^64146721327 is an apocalyptic number.

64146721327 is a deficient number, since it is larger than the sum of its proper divisors (6801420049).

64146721327 is a wasteful number, since it uses less digits than its factorization.

64146721327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133361217.

The product of its digits is 338688, while the sum is 43.

The spelling of 64146721327 in words is "sixty-four billion, one hundred forty-six million, seven hundred twenty-one thousand, three hundred twenty-seven".