16812493569 has 15 divisors (see below), whose sum is σ = 25116702897. Its totient is φ = 11207551068.

The previous prime is 16812493561. The next prime is 16812493573. The reversal of 16812493569 is 96539421861.

The square root of 16812493569 is 129663.

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

16812493569 is a `hidden beast` number, since 1 + 68 + 12 + 4 + 9 + 3 + 569 = 666.

It is not a de Polignac number, because 16812493569 - 2³ = 16812493561 is a prime.

It is a super-2 number, since 2×16812493569² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16812493561) 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, 1159764 + ... + 1174170.

Almost surely, 2^16812493569 is an apocalyptic number.

16812493569 is the 129663-rd square number.

16812493569 is the 64832-nd centered octagonal number.

It is an amenable number.

16812493569 is a deficient number, since it is larger than the sum of its proper divisors (8304209328).

16812493569 is an frugal number, since it uses more digits than its factorization.

16812493569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28826 (or 14410 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The spelling of 16812493569 in words is "sixteen billion, eight hundred twelve million, four hundred ninety-three thousand, five hundred sixty-nine".