64332742321 has 3 divisors (see below), whose sum is σ = 64332995961. Its totient is φ = 64332488682.

The previous prime is 64332742291. The next prime is 64332742349. The reversal of 64332742321 is 12324723346.

The square root of 64332742321 is 253639.

It is a perfect power (a square), and thus also a powerful 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 not a de Polignac number, because 64332742321 - 2¹⁹ = 64332218033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64332742361) 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 2 ways as a sum of consecutive naturals, for example, 126820 + ... + 380458.

It is an arithmetic number, because the mean of its divisors is an integer number (21444331987).

Almost surely, 2^64332742321 is an apocalyptic number.

64332742321 is the 253639-th square number.

64332742321 is the 126820-th centered octagonal number.

It is an amenable number.

64332742321 is a deficient number, since it is larger than the sum of its proper divisors (253640).

64332742321 is an frugal number, since it uses more digits than its factorization.

64332742321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507278 (or 253639 counting only the distinct ones).

The product of its digits is 145152, while the sum is 37.

The spelling of 64332742321 in words is "sixty-four billion, three hundred thirty-two million, seven hundred forty-two thousand, three hundred twenty-one".