72435265351643 has 2 divisors, whose sum is σ = 72435265351644. Its totient is φ = 72435265351642.

The previous prime is 72435265351639. The next prime is 72435265351649. The reversal of 72435265351643 is 34615356253427.

It is a weak prime.

It is an emirp because it is prime and its reverse (34615356253427) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72435265351643 - 2² = 72435265351639 is a prime.

It is not a weakly prime, because it can be changed into another prime (72435265351649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36217632675821 + 36217632675822.

It is an arithmetic number, because the mean of its divisors is an integer number (36217632675822).

Almost surely, 2^{72435265351643} is an apocalyptic number.

72435265351643 is a deficient number, since it is larger than the sum of its proper divisors (1).

72435265351643 is an equidigital number, since it uses as much as digits as its factorization.

72435265351643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432000, while the sum is 56.

The spelling of 72435265351643 in words is "seventy-two trillion, four hundred thirty-five billion, two hundred sixty-five million, three hundred fifty-one thousand, six hundred forty-three".