72645853433 has 2 divisors, whose sum is σ = 72645853434. Its totient is φ = 72645853432.

The previous prime is 72645853367. The next prime is 72645853439. The reversal of 72645853433 is 33435854627.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42424464784 + 30221388649 = 205972^2 + 173843^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72645853433 is a prime.

It is not a weakly prime, because it can be changed into another prime (72645853439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36322926716 + 36322926717.

It is an arithmetic number, because the mean of its divisors is an integer number (36322926717).

Almost surely, 2^72645853433 is an apocalyptic number.

It is an amenable number.

72645853433 is a deficient number, since it is larger than the sum of its proper divisors (1).

72645853433 is an equidigital number, since it uses as much as digits as its factorization.

72645853433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7257600, while the sum is 50.

The spelling of 72645853433 in words is "seventy-two billion, six hundred forty-five million, eight hundred fifty-three thousand, four hundred thirty-three".