498511561 has 2 divisors, whose sum is σ = 498511562. Its totient is φ = 498511560.

The previous prime is 498511549. The next prime is 498511577. The reversal of 498511561 is 165115894.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 444577225 + 53934336 = 21085^2 + 7344^2 .

It is a cyclic number.

It is not a de Polignac number, because 498511561 - 2¹⁷ = 498380489 is a prime.

It is not a weakly prime, because it can be changed into another prime (498511501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249255780 + 249255781.

It is an arithmetic number, because the mean of its divisors is an integer number (249255781).

Almost surely, 2^498511561 is an apocalyptic number.

It is an amenable number.

498511561 is a deficient number, since it is larger than the sum of its proper divisors (1).

498511561 is an equidigital number, since it uses as much as digits as its factorization.

498511561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 40.

The square root of 498511561 is about 22327.3724607263. The cubic root of 498511561 is about 792.9121599645.

The spelling of 498511561 in words is "four hundred ninety-eight million, five hundred eleven thousand, five hundred sixty-one".