31277124643 has 2 divisors, whose sum is σ = 31277124644. Its totient is φ = 31277124642.

The previous prime is 31277124611. The next prime is 31277124661. The reversal of 31277124643 is 34642177213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31277124643 - 2⁵ = 31277124611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31277124596 and 31277124605.

It is not a weakly prime, because it can be changed into another prime (31277124673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15638562321 + 15638562322.

It is an arithmetic number, because the mean of its divisors is an integer number (15638562322).

Almost surely, 2^31277124643 is an apocalyptic number.

31277124643 is a deficient number, since it is larger than the sum of its proper divisors (1).

31277124643 is an equidigital number, since it uses as much as digits as its factorization.

31277124643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 40.

The spelling of 31277124643 in words is "thirty-one billion, two hundred seventy-seven million, one hundred twenty-four thousand, six hundred forty-three".