72540344217043 has 2 divisors, whose sum is σ = 72540344217044. Its totient is φ = 72540344217042.

The previous prime is 72540344217037. The next prime is 72540344217109. The reversal of 72540344217043 is 34071244304527.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72540344217043 - 2¹⁷ = 72540344085971 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72540344216984 and 72540344217002.

It is not a weakly prime, because it can be changed into another prime (72540344217643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36270172108521 + 36270172108522.

It is an arithmetic number, because the mean of its divisors is an integer number (36270172108522).

Almost surely, 2^{72540344217043} is an apocalyptic number.

72540344217043 is a deficient number, since it is larger than the sum of its proper divisors (1).

72540344217043 is an equidigital number, since it uses as much as digits as its factorization.

72540344217043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2257920, while the sum is 46.

The spelling of 72540344217043 in words is "seventy-two trillion, five hundred forty billion, three hundred forty-four million, two hundred seventeen thousand, forty-three".