1235545672573 has 2 divisors, whose sum is σ = 1235545672574. Its totient is φ = 1235545672572.

The previous prime is 1235545672549. The next prime is 1235545672607. The reversal of 1235545672573 is 3752765455321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 924401485764 + 311144186809 = 961458^2 + 557803^2 .

It is an emirp because it is prime and its reverse (3752765455321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1235545672573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1235545672073) 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, 617772836286 + 617772836287.

It is an arithmetic number, because the mean of its divisors is an integer number (617772836287).

Almost surely, 2^{1235545672573} is an apocalyptic number.

It is an amenable number.

1235545672573 is a deficient number, since it is larger than the sum of its proper divisors (1).

1235545672573 is an equidigital number, since it uses as much as digits as its factorization.

1235545672573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26460000, while the sum is 55.

The spelling of 1235545672573 in words is "one trillion, two hundred thirty-five billion, five hundred forty-five million, six hundred seventy-two thousand, five hundred seventy-three".