16300687582921 has 27 divisors (see below), whose sum is σ = 19227769946613. Its totient is φ = 13778876260800.

The previous prime is 16300687582919. The next prime is 16300687582957. The reversal of 16300687582921 is 12928578600361.

The square root of 16300687582921 is 4037411.

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

It can be written as a sum of positive squares in 4 ways, for example, as 1073803700025 + 15226883882896 = 1036245^2 + 3902164^2 .

It is not a de Polignac number, because 16300687582921 - 2¹ = 16300687582919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16300687552921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2063113071 + ... + 2063120971.

Almost surely, 2^{16300687582921} is an apocalyptic number.

16300687582921 is the 4037411-st square number.

16300687582921 is the 2018706-th centered octagonal number.

It is an amenable number.

16300687582921 is a deficient number, since it is larger than the sum of its proper divisors (2927082363692).

16300687582921 is an frugal number, since it uses more digits than its factorization.

16300687582921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15962 (or 7981 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 58.

The spelling of 16300687582921 in words is "sixteen trillion, three hundred billion, six hundred eighty-seven million, five hundred eighty-two thousand, nine hundred twenty-one".