10721263143556 has 27 divisors (see below), whose sum is σ = 21825521861157. Its totient is φ = 4594807415520.

The previous prime is 10721263143551. The next prime is 10721263143601. The reversal of 10721263143556 is 65534136212701.

The square root of 10721263143556 is 3274334.

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., 10092477581956 + 628785561600 = 3176866^2 + 792960^2 .

It is a super-2 number, since 2×10721263143556² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10721263143551) 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, 45723736 + ... + 45957616.

Almost surely, 2^{10721263143556} is an apocalyptic number.

10721263143556 is the 3274334-th square number.

It is an amenable number.

10721263143556 is an abundant number, since it is smaller than the sum of its proper divisors (11104258717601).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10721263143556 is an frugal number, since it uses more digits than its factorization.

10721263143556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467780 (or 233890 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 10721263143556 in words is "ten trillion, seven hundred twenty-one billion, two hundred sixty-three million, one hundred forty-three thousand, five hundred fifty-six".