31968349505 has 8 divisors (see below), whose sum is σ = 38511289512. Its totient is φ = 25475166208.

The previous prime is 31968349493. The next prime is 31968349507. The reversal of 31968349505 is 50594386913.

It can be written as a sum of positive squares in 4 ways, for example, as 11608769536 + 20359579969 = 107744^2 + 142687^2 .

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 31968349505 - 2⁴ = 31968349489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31968349507) 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, 12437762 + ... + 12440331.

It is an arithmetic number, because the mean of its divisors is an integer number (4813911189).

Almost surely, 2^31968349505 is an apocalyptic number.

It is an amenable number.

31968349505 is a deficient number, since it is larger than the sum of its proper divisors (6542940007).

31968349505 is a wasteful number, since it uses less digits than its factorization.

31968349505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24878355.

The product of its (nonzero) digits is 3499200, while the sum is 53.

The spelling of 31968349505 in words is "thirty-one billion, nine hundred sixty-eight million, three hundred forty-nine thousand, five hundred five".