16463866189761 has 15 divisors (see below), whose sum is σ = 24594225032883. Its totient is φ = 10975886447760.

The previous prime is 16463866189703. The next prime is 16463866189811. The reversal of 16463866189761 is 16798166836461.

The square root of 16463866189761 is 4057569.

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

16463866189761 is a `hidden beast` number, since 1 + 6 + 4 + 6 + 386 + 6 + 189 + 7 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3907615679361 + 12556250510400 = 1976769^2 + 3543480^2 .

It is not a de Polignac number, because 16463866189761 - 2¹⁵ = 16463866156993 is a prime.

It is a super-2 number, since 2×16463866189761² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16463866189761.

It is not an unprimeable number, because it can be changed into a prime (16463866189061) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 36292701 + ... + 36743541.

Almost surely, 2^{16463866189761} is an apocalyptic number.

16463866189761 is the 4057569-th square number.

16463866189761 is the 2028785-th centered octagonal number.

It is an amenable number.

16463866189761 is a deficient number, since it is larger than the sum of its proper divisors (8130358843122).

16463866189761 is an frugal number, since it uses more digits than its factorization.

16463866189761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901694 (or 450844 counting only the distinct ones).

The product of its digits is 376233984, while the sum is 72.

The spelling of 16463866189761 in words is "sixteen trillion, four hundred sixty-three billion, eight hundred sixty-six million, one hundred eighty-nine thousand, seven hundred sixty-one".