72738418903918 has 8 divisors (see below), whose sum is σ = 110333556764640. Its totient is φ = 35960566649040.

The previous prime is 72738418903907. The next prime is 72738418903919. The reversal of 72738418903918 is 81930981483727.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72738418903919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204321401238 + ... + 204321401593.

It is an arithmetic number, because the mean of its divisors is an integer number (13791694595580).

Almost surely, 2^{72738418903918} is an apocalyptic number.

72738418903918 is a deficient number, since it is larger than the sum of its proper divisors (37595137860722).

72738418903918 is a wasteful number, since it uses less digits than its factorization.

72738418903918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408642802922.

The product of its (nonzero) digits is 146313216, while the sum is 70.

The spelling of 72738418903918 in words is "seventy-two trillion, seven hundred thirty-eight billion, four hundred eighteen million, nine hundred three thousand, nine hundred eighteen".