54775189681 has 9 divisors (see below), whose sum is σ = 55035974361. Its totient is φ = 54515638212.

The previous prime is 54775189673. The next prime is 54775189687. The reversal of 54775189681 is 18698157745.

The square root of 54775189681 is 234041.

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

It is not a de Polignac number, because 54775189681 - 2³ = 54775189673 is a prime.

It is a super-2 number, since 2×54775189681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54775189687) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 66233190 + ... + 66234016.

Almost surely, 2^54775189681 is an apocalyptic number.

54775189681 is the 234041-st square number.

54775189681 is the 117021-st centered octagonal number.

It is an amenable number.

54775189681 is a deficient number, since it is larger than the sum of its proper divisors (260784680).

54775189681 is an frugal number, since it uses more digits than its factorization.

54775189681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2220 (or 1110 counting only the distinct ones).

The product of its digits is 16934400, while the sum is 61.

The spelling of 54775189681 in words is "fifty-four billion, seven hundred seventy-five million, one hundred eighty-nine thousand, six hundred eighty-one".