64321303631 has 8 divisors (see below), whose sum is σ = 69983211984. Its totient is φ = 58761411840.

The previous prime is 64321303621. The next prime is 64321303663. The reversal of 64321303631 is 13630312346.

It is a happy number.

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 64321303631 - 2²² = 64317109327 is a prime.

It is a super-2 number, since 2×64321303631² (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 (64321303621) 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, 25502825 + ... + 25505346.

It is an arithmetic number, because the mean of its divisors is an integer number (8747901498).

Almost surely, 2^64321303631 is an apocalyptic number.

64321303631 is a deficient number, since it is larger than the sum of its proper divisors (5661908353).

64321303631 is a wasteful number, since it uses less digits than its factorization.

64321303631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51008281.

The product of its (nonzero) digits is 23328, while the sum is 32.

Adding to 64321303631 its reverse (13630312346), we get a palindrome (77951615977).

The spelling of 64321303631 in words is "sixty-four billion, three hundred twenty-one million, three hundred three thousand, six hundred thirty-one".