67680544931 has 2 divisors, whose sum is σ = 67680544932. Its totient is φ = 67680544930.

The previous prime is 67680544853. The next prime is 67680544951. The reversal of 67680544931 is 13944508676.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67680544931 is a prime.

It is a super-2 number, since 2×67680544931² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (67680544951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33840272465 + 33840272466.

It is an arithmetic number, because the mean of its divisors is an integer number (33840272466).

Almost surely, 2^67680544931 is an apocalyptic number.

67680544931 is a deficient number, since it is larger than the sum of its proper divisors (1).

67680544931 is an equidigital number, since it uses as much as digits as its factorization.

67680544931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4354560, while the sum is 53.

The spelling of 67680544931 in words is "sixty-seven billion, six hundred eighty million, five hundred forty-four thousand, nine hundred thirty-one".