31661155116613 has 32 divisors (see below), whose sum is σ = 35169059520000. Its totient is φ = 28262737451520.

The previous prime is 31661155116611. The next prime is 31661155116649.

31661155116613 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 31661155116613 - 2¹ = 31661155116611 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 (31661155116611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 826923556 + ... + 826961842.

It is an arithmetic number, because the mean of its divisors is an integer number (1099033110000).

Almost surely, 2^{31661155116613} is an apocalyptic number.

It is an amenable number.

31661155116613 is a deficient number, since it is larger than the sum of its proper divisors (3507904403387).

31661155116613 is a wasteful number, since it uses less digits than its factorization.

31661155116613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44205.

The product of its digits is 291600, while the sum is 46.

The spelling of 31661155116613 in words is "thirty-one trillion, six hundred sixty-one billion, one hundred fifty-five million, one hundred sixteen thousand, six hundred thirteen".