31680000005 has 8 divisors (see below), whose sum is σ = 38066625024. Its totient is φ = 25310250000.

The previous prime is 31679999983. The next prime is 31680000017. The reversal of 31680000005 is 50000008613.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31680000005 - 2⁶ = 31679999941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4214621 + ... + 4222130.

It is an arithmetic number, because the mean of its divisors is an integer number (4758328128).

Almost surely, 2^31680000005 is an apocalyptic number.

It is an amenable number.

31680000005 is a deficient number, since it is larger than the sum of its proper divisors (6386625019).

31680000005 is an equidigital number, since it uses as much as digits as its factorization.

31680000005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8437507.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 31680000005 its reverse (50000008613), we get a palindrome (81680008618).

The spelling of 31680000005 in words is "thirty-one billion, six hundred eighty million, five", and thus it is an aban number.