64373707321 has 32 divisors (see below), whose sum is σ = 86206464000. Its totient is φ = 47521207440.

The previous prime is 64373707313. The next prime is 64373707357. The reversal of 64373707321 is 12370737346.

It is not a de Polignac number, because 64373707321 - 2³ = 64373707313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64373704321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 377305 + ... + 520678.

It is an arithmetic number, because the mean of its divisors is an integer number (2693952000).

Almost surely, 2^64373707321 is an apocalyptic number.

It is an amenable number.

64373707321 is a deficient number, since it is larger than the sum of its proper divisors (21832756679).

64373707321 is a wasteful number, since it uses less digits than its factorization.

64373707321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898034 (or 898020 counting only the distinct ones).

The product of its (nonzero) digits is 444528, while the sum is 43.

The spelling of 64373707321 in words is "sixty-four billion, three hundred seventy-three million, seven hundred seven thousand, three hundred twenty-one".