490671949377681 has 12 divisors (see below), whose sum is σ = 708846305419252. Its totient is φ = 327069432566496.

The previous prime is 490671949377641. The next prime is 490671949377703. The reversal of 490671949377681 is 186773949176094.

490671949377681 is a `hidden beast` number, since 4 + 9 + 0 + 67 + 1 + 9 + 493 + 7 + 7 + 68 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 321493542318081 + 169178407059600 = 17930241^2 + 13006860^2 .

It is not a de Polignac number, because 490671949377681 - 2¹¹ = 490671949375633 is a prime.

It is a super-2 number, since 2×490671949377681² (a number of 30 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 490671949377681.

It is not an unprimeable number, because it can be changed into a prime (490671949377641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3766627246 + ... + 3766757511.

Almost surely, 2^{490671949377681} is an apocalyptic number.

It is an amenable number.

490671949377681 is a deficient number, since it is larger than the sum of its proper divisors (218174356041571).

490671949377681 is a wasteful number, since it uses less digits than its factorization.

490671949377681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7533392000 (or 7533391997 counting only the distinct ones).

The product of its (nonzero) digits is 3456649728, while the sum is 81.

The spelling of 490671949377681 in words is "four hundred ninety trillion, six hundred seventy-one billion, nine hundred forty-nine million, three hundred seventy-seven thousand, six hundred eighty-one".