72738418903919 has 2 divisors, whose sum is σ = 72738418903920. Its totient is φ = 72738418903918.

The previous prime is 72738418903907. The next prime is 72738418903921. The reversal of 72738418903919 is 91930981483727.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72738418903919 - 2⁸ = 72738418903663 is a prime.

It is a super-2 number, since 2×72738418903919² (a number of 29 digits) contains 22 as substring.

Together with 72738418903921, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72738618903919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36369209451959 + 36369209451960.

It is an arithmetic number, because the mean of its divisors is an integer number (36369209451960).

Almost surely, 2^{72738418903919} is an apocalyptic number.

72738418903919 is a deficient number, since it is larger than the sum of its proper divisors (1).

72738418903919 is an equidigital number, since it uses as much as digits as its factorization.

72738418903919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 164602368, while the sum is 71.

The spelling of 72738418903919 in words is "seventy-two trillion, seven hundred thirty-eight billion, four hundred eighteen million, nine hundred three thousand, nine hundred nineteen".