490356894681 has 6 divisors (see below), whose sum is σ = 708293292330. Its totient is φ = 326904596448.

The previous prime is 490356894679. The next prime is 490356894683. The reversal of 490356894681 is 186498653094.

490356894681 is a `hidden beast` number, since 4 + 9 + 0 + 3 + 568 + 9 + 4 + 68 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (490356894679) and next prime (490356894683).

It can be written as a sum of positive squares in only one way, i.e., 456625899081 + 33730995600 = 675741^2 + 183660^2 .

It is not a de Polignac number, because 490356894681 - 2¹ = 490356894679 is a prime.

It is a super-2 number, since 2×490356894681² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (490356894683) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27242049696 + ... + 27242049713.

It is an arithmetic number, because the mean of its divisors is an integer number (118048882055).

Almost surely, 2^490356894681 is an apocalyptic number.

It is an amenable number.

490356894681 is a deficient number, since it is larger than the sum of its proper divisors (217936397649).

490356894681 is a wasteful number, since it uses less digits than its factorization.

490356894681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54484099415 (or 54484099412 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 63.

The spelling of 490356894681 in words is "four hundred ninety billion, three hundred fifty-six million, eight hundred ninety-four thousand, six hundred eighty-one".