491590478226 has 32 divisors (see below), whose sum is σ = 1001783401920. Its totient is φ = 160763405504.

The previous prime is 491590478207. The next prime is 491590478227. The reversal of 491590478226 is 622874095194.

It is a super-2 number, since 2×491590478226² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (491590478227) 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 15 ways as a sum of consecutive naturals, for example, 10334485 + ... + 10381943.

It is an arithmetic number, because the mean of its divisors is an integer number (31305731310).

Almost surely, 2^491590478226 is an apocalyptic number.

491590478226 is an abundant number, since it is smaller than the sum of its proper divisors (510192923694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

491590478226 is a wasteful number, since it uses less digits than its factorization.

491590478226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80090.

The product of its (nonzero) digits is 8709120, while the sum is 57.

The spelling of 491590478226 in words is "four hundred ninety-one billion, five hundred ninety million, four hundred seventy-eight thousand, two hundred twenty-six".