9862357112721 has 27 divisors (see below), whose sum is σ = 14754203107761. Its totient is φ = 6348008024064.

The previous prime is 9862357112701. The next prime is 9862357112731. The reversal of 9862357112721 is 1272117532689.

The square root of 9862357112721 is 3140439.

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

9862357112721 is a `hidden beast` number, since 9 + 8 + 6 + 2 + 357 + 11 + 272 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1151382650625 + 8710974462096 = 1073025^2 + 2951436^2 .

It is not a de Polignac number, because 9862357112721 - 2⁵ = 9862357112689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9862357112701) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 273200145 + ... + 273236241.

Almost surely, 2^{9862357112721} is an apocalyptic number.

9862357112721 is the 3140439-th square number.

9862357112721 is the 1570220-th centered octagonal number.

It is an amenable number.

9862357112721 is a deficient number, since it is larger than the sum of its proper divisors (4891845995040).

9862357112721 is an frugal number, since it uses more digits than its factorization.

9862357112721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72258 (or 36129 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The spelling of 9862357112721 in words is "nine trillion, eight hundred sixty-two billion, three hundred fifty-seven million, one hundred twelve thousand, seven hundred twenty-one".