31664167161 has 64 divisors (see below), whose sum is σ = 47221574400. Its totient is φ = 18713640960.

The previous prime is 31664167159. The next prime is 31664167181. The reversal of 31664167161 is 16176146613.

It is not a de Polignac number, because 31664167161 - 2¹ = 31664167159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31664167181) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 93958785 + ... + 93959121.

It is an arithmetic number, because the mean of its divisors is an integer number (737837100).

Almost surely, 2^31664167161 is an apocalyptic number.

It is an amenable number.

31664167161 is a deficient number, since it is larger than the sum of its proper divisors (15557407239).

31664167161 is a wasteful number, since it uses less digits than its factorization.

31664167161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794.

The product of its digits is 108864, while the sum is 42.

The spelling of 31664167161 in words is "thirty-one billion, six hundred sixty-four million, one hundred sixty-seven thousand, one hundred sixty-one".