31611435542164 has 6 divisors (see below), whose sum is σ = 55320012198794. Its totient is φ = 15805717771080.

The previous prime is 31611435542147. The next prime is 31611435542213. The reversal of 31611435542164 is 46124553411613.

It can be written as a sum of positive squares in only one way, i.e., 26150520882564 + 5460914659600 = 5113758^2 + 2336860^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3951429442767 + ... + 3951429442774.

Almost surely, 2^{31611435542164} is an apocalyptic number.

It is an amenable number.

31611435542164 is a deficient number, since it is larger than the sum of its proper divisors (23708576656630).

31611435542164 is a wasteful number, since it uses less digits than its factorization.

31611435542164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7902858885545 (or 7902858885543 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 46.

Adding to 31611435542164 its reverse (46124553411613), we get a palindrome (77735988953777).

The spelling of 31611435542164 in words is "thirty-one trillion, six hundred eleven billion, four hundred thirty-five million, five hundred forty-two thousand, one hundred sixty-four".