56727166509 has 40 divisors (see below), whose sum is σ = 92621279520. Its totient is φ = 34387952544.

The previous prime is 56727166451. The next prime is 56727166549. The reversal of 56727166509 is 90566172765.

56727166509 is a `hidden beast` number, since 5 + 6 + 7 + 2 + 71 + 66 + 509 = 666.

It is not a de Polignac number, because 56727166509 - 2⁷ = 56727166381 is a prime.

It is a super-2 number, since 2×56727166509² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56727166549) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 331479 + ... + 472580.

It is an arithmetic number, because the mean of its divisors is an integer number (2315531988).

Almost surely, 2^56727166509 is an apocalyptic number.

It is an amenable number.

56727166509 is a deficient number, since it is larger than the sum of its proper divisors (35894113011).

56727166509 is a wasteful number, since it uses less digits than its factorization.

56727166509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804151 (or 804142 counting only the distinct ones).

The product of its (nonzero) digits is 4762800, while the sum is 54.

The spelling of 56727166509 in words is "fifty-six billion, seven hundred twenty-seven million, one hundred sixty-six thousand, five hundred nine".