499056060721 has 9 divisors (see below), whose sum is σ = 526718762283. Its totient is φ = 472777236360.

The previous prime is 499056060703. The next prime is 499056060733. The reversal of 499056060721 is 127060650994.

It is a happy number.

The square root of 499056060721 is 706439.

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

It can be written as a sum of positive squares in only one way, i.e., 153476681121 + 345579379600 = 391761^2 + 587860^2 .

It is not a de Polignac number, because 499056060721 - 2¹¹ = 499056058673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (499056060761) 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 8 ways as a sum of consecutive naturals, for example, 13403751 + ... + 13440931.

Almost surely, 2^499056060721 is an apocalyptic number.

499056060721 is the 706439-th square number.

499056060721 is the 353220-th centered octagonal number.

It is an amenable number.

499056060721 is a deficient number, since it is larger than the sum of its proper divisors (27662701562).

499056060721 is an frugal number, since it uses more digits than its factorization.

499056060721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74400 (or 37200 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 49.

Multiplying 499056060721 by its sum of digits (49), we get a square (24453746975329 = 4945073²).

The spelling of 499056060721 in words is "four hundred ninety-nine billion, fifty-six million, sixty thousand, seven hundred twenty-one".