64332631 has 8 divisors (see below), whose sum is σ = 70905744. Its totient is φ = 57880320.

The previous prime is 64332629. The next prime is 64332673. The reversal of 64332631 is 13623346.

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 64332631 - 2¹ = 64332629 is a prime.

It is a super-2 number, since 2×64332631² = 8277374822764322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64332631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64332691) 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, 29080 + ... + 31213.

It is an arithmetic number, because the mean of its divisors is an integer number (8863218).

Almost surely, 2^64332631 is an apocalyptic number.

64332631 is a deficient number, since it is larger than the sum of its proper divisors (6573113).

64332631 is a wasteful number, since it uses less digits than its factorization.

64332631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60401.

The product of its digits is 7776, while the sum is 28.

The square root of 64332631 is about 8020.7624949253. The cubic root of 64332631 is about 400.6917841470.

Adding to 64332631 its reverse (13623346), we get a palindrome (77955977).

The spelling of 64332631 in words is "sixty-four million, three hundred thirty-two thousand, six hundred thirty-one".