72318104445121 has 2 divisors, whose sum is σ = 72318104445122. Its totient is φ = 72318104445120.

The previous prime is 72318104445079. The next prime is 72318104445143. The reversal of 72318104445121 is 12154440181327.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67453040480400 + 4865063964721 = 8212980^2 + 2205689^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72318104445121 is a prime.

It is not a weakly prime, because it can be changed into another prime (72318104475121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36159052222560 + 36159052222561.

It is an arithmetic number, because the mean of its divisors is an integer number (36159052222561).

Almost surely, 2^{72318104445121} is an apocalyptic number.

It is an amenable number.

72318104445121 is a deficient number, since it is larger than the sum of its proper divisors (1).

72318104445121 is an equidigital number, since it uses as much as digits as its factorization.

72318104445121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 215040, while the sum is 43.

The spelling of 72318104445121 in words is "seventy-two trillion, three hundred eighteen billion, one hundred four million, four hundred forty-five thousand, one hundred twenty-one".