499129533081 has 45 divisors (see below), whose sum is σ = 779669138479. Its totient is φ = 318192242544.

The previous prime is 499129533043. The next prime is 499129533163. The reversal of 499129533081 is 180335921994.

The square root of 499129533081 is 706491.

It is a perfect power (a square), and thus also a powerful number.

499129533081 is a `hidden beast` number, since 4 + 9 + 9 + 1 + 29 + 533 + 0 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 470877302025 + 28252231056 = 686205^2 + 168084^2 .

It is not a de Polignac number, because 499129533081 - 2⁹ = 499129532569 is a prime.

It is a super-2 number, since 2×499129533081² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (499129533011) 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 44 ways as a sum of consecutive naturals, for example, 146241931 + ... + 146245343.

Almost surely, 2^499129533081 is an apocalyptic number.

499129533081 is the 706491-st square number.

499129533081 is the 353246-th centered octagonal number.

It is an amenable number.

499129533081 is a deficient number, since it is larger than the sum of its proper divisors (280539605398).

499129533081 is an frugal number, since it uses more digits than its factorization.

499129533081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6884 (or 3439 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 54.

The spelling of 499129533081 in words is "four hundred ninety-nine billion, one hundred twenty-nine million, five hundred thirty-three thousand, eighty-one".