31632140064 has 96 divisors (see below), whose sum is σ = 95311278720. Its totient is φ = 8998244352.

The previous prime is 31632140047. The next prime is 31632140077. The reversal of 31632140064 is 46004123613.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51112 + ... + 256664.

It is an arithmetic number, because the mean of its divisors is an integer number (992825820).

Almost surely, 2^31632140064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31632140064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47655639360).

31632140064 is an abundant number, since it is smaller than the sum of its proper divisors (63679138656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31632140064 is a wasteful number, since it uses less digits than its factorization.

31632140064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205802 (or 205794 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

Adding to 31632140064 its reverse (46004123613), we get a palindrome (77636263677).

The spelling of 31632140064 in words is "thirty-one billion, six hundred thirty-two million, one hundred forty thousand, sixty-four".