72738418903907 has 2 divisors, whose sum is σ = 72738418903908. Its totient is φ = 72738418903906.

The previous prime is 72738418903897. The next prime is 72738418903919. The reversal of 72738418903907 is 70930981483727.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72738418903907 - 2²² = 72738414709603 is a prime.

It is not a weakly prime, because it can be changed into another prime (72738418903807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36369209451953 + 36369209451954.

It is an arithmetic number, because the mean of its divisors is an integer number (36369209451954).

Almost surely, 2^{72738418903907} is an apocalyptic number.

72738418903907 is a deficient number, since it is larger than the sum of its proper divisors (1).

72738418903907 is an equidigital number, since it uses as much as digits as its factorization.

72738418903907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128024064, while the sum is 68.

The spelling of 72738418903907 in words is "seventy-two trillion, seven hundred thirty-eight billion, four hundred eighteen million, nine hundred three thousand, nine hundred seven".