72511780787 has 2 divisors, whose sum is σ = 72511780788. Its totient is φ = 72511780786.

The previous prime is 72511780763. The next prime is 72511780843. The reversal of 72511780787 is 78708711527.

It is a weak prime.

It is an emirp because it is prime and its reverse (78708711527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72511780787 - 2⁸ = 72511780531 is a prime.

It is not a weakly prime, because it can be changed into another prime (72511780387) 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, 36255890393 + 36255890394.

It is an arithmetic number, because the mean of its divisors is an integer number (36255890394).

Almost surely, 2^72511780787 is an apocalyptic number.

72511780787 is a deficient number, since it is larger than the sum of its proper divisors (1).

72511780787 is an equidigital number, since it uses as much as digits as its factorization.

72511780787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536640, while the sum is 53.

The spelling of 72511780787 in words is "seventy-two billion, five hundred eleven million, seven hundred eighty thousand, seven hundred eighty-seven".