490657018897 has 2 divisors, whose sum is σ = 490657018898. Its totient is φ = 490657018896.

The previous prime is 490657018889. The next prime is 490657018903. The reversal of 490657018897 is 798810756094.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 465177197521 + 25479821376 = 682039^2 + 159624^2 .

It is a cyclic number.

It is not a de Polignac number, because 490657018897 - 2³ = 490657018889 is a prime.

It is not a weakly prime, because it can be changed into another prime (490657018997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245328509448 + 245328509449.

It is an arithmetic number, because the mean of its divisors is an integer number (245328509449).

Almost surely, 2^490657018897 is an apocalyptic number.

It is an amenable number.

490657018897 is a deficient number, since it is larger than the sum of its proper divisors (1).

490657018897 is an equidigital number, since it uses as much as digits as its factorization.

490657018897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30481920, while the sum is 64.

The spelling of 490657018897 in words is "four hundred ninety billion, six hundred fifty-seven million, eighteen thousand, eight hundred ninety-seven".