83773786643 has 2 divisors, whose sum is σ = 83773786644. Its totient is φ = 83773786642.

The previous prime is 83773786637. The next prime is 83773786661. The reversal of 83773786643 is 34668737738.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83773786643 is a prime.

It is not a weakly prime, because it can be changed into another prime (83773786633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41886893321 + 41886893322.

It is an arithmetic number, because the mean of its divisors is an integer number (41886893322).

Almost surely, 2^83773786643 is an apocalyptic number.

83773786643 is a deficient number, since it is larger than the sum of its proper divisors (1).

83773786643 is an equidigital number, since it uses as much as digits as its factorization.

83773786643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 85349376, while the sum is 62.

The spelling of 83773786643 in words is "eighty-three billion, seven hundred seventy-three million, seven hundred eighty-six thousand, six hundred forty-three".