55178827081 has 16 divisors (see below), whose sum is σ = 63537868800. Its totient is φ = 46939117968.

The previous prime is 55178827073. The next prime is 55178827139. The reversal of 55178827081 is 18072887155.

It is a cyclic number.

It is not a de Polignac number, because 55178827081 - 2³ = 55178827073 is a prime.

It is a super-2 number, since 2×55178827081² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55178827021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3259866 + ... + 3276748.

It is an arithmetic number, because the mean of its divisors is an integer number (3971116800).

Almost surely, 2^55178827081 is an apocalyptic number.

It is an amenable number.

55178827081 is a deficient number, since it is larger than the sum of its proper divisors (8359041719).

55178827081 is a wasteful number, since it uses less digits than its factorization.

55178827081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20388.

The product of its (nonzero) digits is 1254400, while the sum is 52.

The spelling of 55178827081 in words is "fifty-five billion, one hundred seventy-eight million, eight hundred twenty-seven thousand, eighty-one".