72738418903663 has 2 divisors, whose sum is σ = 72738418903664. Its totient is φ = 72738418903662.

The previous prime is 72738418903609. The next prime is 72738418903669. The reversal of 72738418903663 is 36630981483727.

It is a strong prime.

It is an emirp because it is prime and its reverse (36630981483727) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72738418903663 - 2⁹ = 72738418903151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72738418903669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36369209451831 + 36369209451832.

It is an arithmetic number, because the mean of its divisors is an integer number (36369209451832).

Almost surely, 2^{72738418903663} is an apocalyptic number.

72738418903663 is a deficient number, since it is larger than the sum of its proper divisors (1).

72738418903663 is an equidigital number, since it uses as much as digits as its factorization.

72738418903663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 219469824, while the sum is 67.

The spelling of 72738418903663 in words is "seventy-two trillion, seven hundred thirty-eight billion, four hundred eighteen million, nine hundred three thousand, six hundred sixty-three".