498561194881 has 2 divisors, whose sum is σ = 498561194882. Its totient is φ = 498561194880.

The previous prime is 498561194749. The next prime is 498561194903. The reversal of 498561194881 is 188491165894.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 434834736400 + 63726458481 = 659420^2 + 252441^2 .

It is a cyclic number.

It is not a de Polignac number, because 498561194881 - 2¹³ = 498561186689 is a prime.

It is a super-2 number, since 2×498561194881² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (498561194281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249280597440 + 249280597441.

It is an arithmetic number, because the mean of its divisors is an integer number (249280597441).

Almost surely, 2^498561194881 is an apocalyptic number.

It is an amenable number.

498561194881 is a deficient number, since it is larger than the sum of its proper divisors (1).

498561194881 is an equidigital number, since it uses as much as digits as its factorization.

498561194881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19906560, while the sum is 64.

The spelling of 498561194881 in words is "four hundred ninety-eight billion, five hundred sixty-one million, one hundred ninety-four thousand, eight hundred eighty-one".