505533025409 has 2 divisors, whose sum is σ = 505533025410. Its totient is φ = 505533025408.

The previous prime is 505533025339. The next prime is 505533025429. The reversal of 505533025409 is 904520335505.

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., 504952360000 + 580665409 = 710600^2 + 24097^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505533025409 is a prime.

It is not a weakly prime, because it can be changed into another prime (505533025429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252766512704 + 252766512705.

It is an arithmetic number, because the mean of its divisors is an integer number (252766512705).

Almost surely, 2^505533025409 is an apocalyptic number.

It is an amenable number.

505533025409 is a deficient number, since it is larger than the sum of its proper divisors (1).

505533025409 is an equidigital number, since it uses as much as digits as its factorization.

505533025409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 405000, while the sum is 41.

The spelling of 505533025409 in words is "five hundred five billion, five hundred thirty-three million, twenty-five thousand, four hundred nine".