490633481581 has 16 divisors (see below), whose sum is σ = 509500104256. Its totient is φ = 472120742016.

The previous prime is 490633481573. The next prime is 490633481621. The reversal of 490633481581 is 185184336094.

It is a cyclic number.

It is not a de Polignac number, because 490633481581 - 2³ = 490633481573 is a prime.

It is a super-2 number, since 2×490633481581² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (490633481501) 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, 2683231 + ... + 2860243.

It is an arithmetic number, because the mean of its divisors is an integer number (31843756516).

Almost surely, 2^490633481581 is an apocalyptic number.

It is an amenable number.

490633481581 is a deficient number, since it is larger than the sum of its proper divisors (18866622675).

490633481581 is a wasteful number, since it uses less digits than its factorization.

490633481581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178012.

The product of its (nonzero) digits is 2488320, while the sum is 52.

The spelling of 490633481581 in words is "four hundred ninety billion, six hundred thirty-three million, four hundred eighty-one thousand, five hundred eighty-one".