3131961668 has 48 divisors (see below), whose sum is σ = 6036455040. Its totient is φ = 1410048000.

The previous prime is 3131961661. The next prime is 3131961671. The reversal of 3131961668 is 8661691313.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (3131961661) by changing a digit.

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, 4072388 + ... + 4073156.

It is an arithmetic number, because the mean of its divisors is an integer number (125759480).

Almost surely, 2^3131961668 is an apocalyptic number.

It is an amenable number.

3131961668 is a deficient number, since it is larger than the sum of its proper divisors (2904493372).

3131961668 is a wasteful number, since it uses less digits than its factorization.

3131961668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1548 (or 1546 counting only the distinct ones).

The product of its digits is 139968, while the sum is 44.

The square root of 3131961668 is about 55963.9318490043. The cubic root of 3131961668 is about 1463.0937194239.

The spelling of 3131961668 in words is "three billion, one hundred thirty-one million, nine hundred sixty-one thousand, six hundred sixty-eight".