72345487633 has 2 divisors, whose sum is σ = 72345487634. Its totient is φ = 72345487632.

The previous prime is 72345487549. The next prime is 72345487637. The reversal of 72345487633 is 33678454327.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68787126529 + 3558361104 = 262273^2 + 59652^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72345487633 is a prime.

It is not a weakly prime, because it can be changed into another prime (72345487637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36172743816 + 36172743817.

It is an arithmetic number, because the mean of its divisors is an integer number (36172743817).

Almost surely, 2^72345487633 is an apocalyptic number.

It is an amenable number.

72345487633 is a deficient number, since it is larger than the sum of its proper divisors (1).

72345487633 is an equidigital number, since it uses as much as digits as its factorization.

72345487633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10160640, while the sum is 52.

The spelling of 72345487633 in words is "seventy-two billion, three hundred forty-five million, four hundred eighty-seven thousand, six hundred thirty-three".