31611611613 has 8 divisors (see below), whose sum is σ = 42159040000. Its totient is φ = 21069295488.

The previous prime is 31611611611. The next prime is 31611611621.

31611611613 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 31611611613 - 2¹ = 31611611611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31611611611) 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, 1263613 + ... + 1288386.

It is an arithmetic number, because the mean of its divisors is an integer number (5269880000).

Almost surely, 2^31611611613 is an apocalyptic number.

It is an amenable number.

31611611613 is a deficient number, since it is larger than the sum of its proper divisors (10547428387).

31611611613 is a wasteful number, since it uses less digits than its factorization.

31611611613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2556131.

The product of its digits is 1944, while the sum is 30.

The spelling of 31611611613 in words is "thirty-one billion, six hundred eleven million, six hundred eleven thousand, six hundred thirteen".