490957918889 has 2 divisors, whose sum is σ = 490957918890. Its totient is φ = 490957918888.

The previous prime is 490957918883. The next prime is 490957918897. The reversal of 490957918889 is 988819759094.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 275406643264 + 215551275625 = 524792^2 + 464275^2 .

It is a cyclic number.

It is not a de Polignac number, because 490957918889 - 2¹² = 490957914793 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (490957918883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245478959444 + 245478959445.

It is an arithmetic number, because the mean of its divisors is an integer number (245478959445).

Almost surely, 2^490957918889 is an apocalyptic number.

It is an amenable number.

490957918889 is a deficient number, since it is larger than the sum of its proper divisors (1).

490957918889 is an equidigital number, since it uses as much as digits as its factorization.

490957918889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 470292480, while the sum is 77.

The spelling of 490957918889 in words is "four hundred ninety billion, nine hundred fifty-seven million, nine hundred eighteen thousand, eight hundred eighty-nine".