72788755691 has 2 divisors, whose sum is σ = 72788755692. Its totient is φ = 72788755690.

The previous prime is 72788755667. The next prime is 72788755693. The reversal of 72788755691 is 19655788727.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72788755691 is a prime.

Together with 72788755693, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72788755693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36394377845 + 36394377846.

It is an arithmetic number, because the mean of its divisors is an integer number (36394377846).

Almost surely, 2^72788755691 is an apocalyptic number.

72788755691 is a deficient number, since it is larger than the sum of its proper divisors (1).

72788755691 is an equidigital number, since it uses as much as digits as its factorization.

72788755691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 59270400, while the sum is 65.

The spelling of 72788755691 in words is "seventy-two billion, seven hundred eighty-eight million, seven hundred fifty-five thousand, six hundred ninety-one".