72117888287 has 2 divisors, whose sum is σ = 72117888288. Its totient is φ = 72117888286.

The previous prime is 72117888263. The next prime is 72117888307. The reversal of 72117888287 is 78288871127.

It is a strong prime.

It is an emirp because it is prime and its reverse (78288871127) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72117888287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72117887287) 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, 36058944143 + 36058944144.

It is an arithmetic number, because the mean of its divisors is an integer number (36058944144).

Almost surely, 2^72117888287 is an apocalyptic number.

72117888287 is a deficient number, since it is larger than the sum of its proper divisors (1).

72117888287 is an equidigital number, since it uses as much as digits as its factorization.

72117888287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5619712, while the sum is 59.

The spelling of 72117888287 in words is "seventy-two billion, one hundred seventeen million, eight hundred eighty-eight thousand, two hundred eighty-seven".