545510491 has 2 divisors, whose sum is σ = 545510492. Its totient is φ = 545510490.

The previous prime is 545510479. The next prime is 545510507. The reversal of 545510491 is 194015545.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 545510491 - 2⁷ = 545510363 is a prime.

It is a super-2 number, since 2×545510491² = 595163391582122162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (545510431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272755245 + 272755246.

It is an arithmetic number, because the mean of its divisors is an integer number (272755246).

Almost surely, 2^545510491 is an apocalyptic number.

545510491 is a deficient number, since it is larger than the sum of its proper divisors (1).

545510491 is an equidigital number, since it uses as much as digits as its factorization.

545510491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 34.

The square root of 545510491 is about 23356.1660167075. The cubic root of 545510491 is about 817.0858740368.

The spelling of 545510491 in words is "five hundred forty-five million, five hundred ten thousand, four hundred ninety-one".