63726916843 has 2 divisors, whose sum is σ = 63726916844. Its totient is φ = 63726916842.

The previous prime is 63726916829. The next prime is 63726916879. The reversal of 63726916843 is 34861962736.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63726916843 is a prime.

It is a super-2 number, since 2×63726916843² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (63726916543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31863458421 + 31863458422.

It is an arithmetic number, because the mean of its divisors is an integer number (31863458422).

Almost surely, 2^63726916843 is an apocalyptic number.

63726916843 is a deficient number, since it is larger than the sum of its proper divisors (1).

63726916843 is an equidigital number, since it uses as much as digits as its factorization.

63726916843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7838208, while the sum is 55.

The spelling of 63726916843 in words is "sixty-three billion, seven hundred twenty-six million, nine hundred sixteen thousand, eight hundred forty-three".