72768721843 has 2 divisors, whose sum is σ = 72768721844. Its totient is φ = 72768721842.

The previous prime is 72768721723. The next prime is 72768721897. The reversal of 72768721843 is 34812786727.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72768721843 - 2²⁹ = 72231850931 is a prime.

It is not a weakly prime, because it can be changed into another prime (72768721043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36384360921 + 36384360922.

It is an arithmetic number, because the mean of its divisors is an integer number (36384360922).

Almost surely, 2^72768721843 is an apocalyptic number.

72768721843 is a deficient number, since it is larger than the sum of its proper divisors (1).

72768721843 is an equidigital number, since it uses as much as digits as its factorization.

72768721843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6322176, while the sum is 55.

The spelling of 72768721843 in words is "seventy-two billion, seven hundred sixty-eight million, seven hundred twenty-one thousand, eight hundred forty-three".