505535145491 has 2 divisors, whose sum is σ = 505535145492. Its totient is φ = 505535145490.

The previous prime is 505535145473. The next prime is 505535145539. The reversal of 505535145491 is 194541535505.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505535145491 is a prime.

It is not a weakly prime, because it can be changed into another prime (505535145191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252767572745 + 252767572746.

It is an arithmetic number, because the mean of its divisors is an integer number (252767572746).

Almost surely, 2^505535145491 is an apocalyptic number.

505535145491 is a deficient number, since it is larger than the sum of its proper divisors (1).

505535145491 is an equidigital number, since it uses as much as digits as its factorization.

505535145491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1350000, while the sum is 47.

The spelling of 505535145491 in words is "five hundred five billion, five hundred thirty-five million, one hundred forty-five thousand, four hundred ninety-one".