490449355877 has 4 divisors (see below), whose sum is σ = 528176229420. Its totient is φ = 452722482336.

The previous prime is 490449355849. The next prime is 490449355901. The reversal of 490449355877 is 778553944094.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 778553944094 = 2 ⋅389276972047.

It can be written as a sum of positive squares in 2 ways, for example, as 76062330436 + 414387025441 = 275794^2 + 643729^2 .

It is a cyclic number.

It is not a de Polignac number, because 490449355877 - 2¹⁴ = 490449339493 is a prime.

It is a super-3 number, since 3×490449355877³ (a number of 36 digits) contains 333 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 (490449354877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18863436752 + ... + 18863436777.

It is an arithmetic number, because the mean of its divisors is an integer number (132044057355).

Almost surely, 2^490449355877 is an apocalyptic number.

It is an amenable number.

490449355877 is a deficient number, since it is larger than the sum of its proper divisors (37726873543).

490449355877 is a wasteful number, since it uses less digits than its factorization.

490449355877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37726873542.

The product of its (nonzero) digits is 152409600, while the sum is 65.

The spelling of 490449355877 in words is "four hundred ninety billion, four hundred forty-nine million, three hundred fifty-five thousand, eight hundred seventy-seven".