490740790261 has 2 divisors, whose sum is σ = 490740790262. Its totient is φ = 490740790260.

The previous prime is 490740790249. The next prime is 490740790271. The reversal of 490740790261 is 162097047094.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 438210900625 + 52529889636 = 661975^2 + 229194^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-490740790261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (490740790271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245370395130 + 245370395131.

It is an arithmetic number, because the mean of its divisors is an integer number (245370395131).

Almost surely, 2^490740790261 is an apocalyptic number.

It is an amenable number.

490740790261 is a deficient number, since it is larger than the sum of its proper divisors (1).

490740790261 is an equidigital number, since it uses as much as digits as its factorization.

490740790261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 49.

The spelling of 490740790261 in words is "four hundred ninety billion, seven hundred forty million, seven hundred ninety thousand, two hundred sixty-one".