490287090261 has 4 divisors (see below), whose sum is σ = 653716120352. Its totient is φ = 326858060172.

The previous prime is 490287090239. The next prime is 490287090311. The reversal of 490287090261 is 162090782094.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-490287090261 is a prime.

It is a super-2 number, since 2×490287090261² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 490287090261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (490287090361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81714515041 + ... + 81714515046.

It is an arithmetic number, because the mean of its divisors is an integer number (163429030088).

Almost surely, 2^490287090261 is an apocalyptic number.

It is an amenable number.

490287090261 is a deficient number, since it is larger than the sum of its proper divisors (163429030091).

490287090261 is a wasteful number, since it uses less digits than its factorization.

490287090261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163429030090.

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 490287090261 in words is "four hundred ninety billion, two hundred eighty-seven million, ninety thousand, two hundred sixty-one".