72644487719 has 2 divisors, whose sum is σ = 72644487720. Its totient is φ = 72644487718.

The previous prime is 72644487709. The next prime is 72644487739. The reversal of 72644487719 is 91778444627.

It is a weak prime.

It is an emirp because it is prime and its reverse (91778444627) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72644487719 is a prime.

It is a super-2 number, since 2×72644487719² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72644487709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36322243859 + 36322243860.

It is an arithmetic number, because the mean of its divisors is an integer number (36322243860).

Almost surely, 2^72644487719 is an apocalyptic number.

72644487719 is a deficient number, since it is larger than the sum of its proper divisors (1).

72644487719 is an equidigital number, since it uses as much as digits as its factorization.

72644487719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18966528, while the sum is 59.

The spelling of 72644487719 in words is "seventy-two billion, six hundred forty-four million, four hundred eighty-seven thousand, seven hundred nineteen".