497511531161 has 2 divisors, whose sum is σ = 497511531162. Its totient is φ = 497511531160.

The previous prime is 497511531157. The next prime is 497511531203. The reversal of 497511531161 is 161135115794.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 267476186761 + 230035344400 = 517181^2 + 479620^2 .

It is a cyclic number.

It is not a de Polignac number, because 497511531161 - 2² = 497511531157 is a prime.

It is not a weakly prime, because it can be changed into another prime (497511531761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248755765580 + 248755765581.

It is an arithmetic number, because the mean of its divisors is an integer number (248755765581).

Almost surely, 2^497511531161 is an apocalyptic number.

It is an amenable number.

497511531161 is a deficient number, since it is larger than the sum of its proper divisors (1).

497511531161 is an equidigital number, since it uses as much as digits as its factorization.

497511531161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113400, while the sum is 44.

The spelling of 497511531161 in words is "four hundred ninety-seven billion, five hundred eleven million, five hundred thirty-one thousand, one hundred sixty-one".