161131656334 has 32 divisors (see below), whose sum is σ = 266422400640. Its totient is φ = 72477876000.

The previous prime is 161131656197. The next prime is 161131656341. The reversal of 161131656334 is 433656131161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4379017 + ... + 4415659.

It is an arithmetic number, because the mean of its divisors is an integer number (8325700020).

Almost surely, 2^161131656334 is an apocalyptic number.

161131656334 is a deficient number, since it is larger than the sum of its proper divisors (105290744306).

161131656334 is a wasteful number, since it uses less digits than its factorization.

161131656334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38736.

The product of its digits is 116640, while the sum is 40.

Adding to 161131656334 its reverse (433656131161), we get a palindrome (594787787495).

The spelling of 161131656334 in words is "one hundred sixty-one billion, one hundred thirty-one million, six hundred fifty-six thousand, three hundred thirty-four".