55188681323 has 4 divisors (see below), whose sum is σ = 58435074360. Its totient is φ = 51942288288.

The previous prime is 55188681319. The next prime is 55188681377. The reversal of 55188681323 is 32318688155.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55188681323 - 2² = 55188681319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55188683323) 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 3 ways as a sum of consecutive naturals, for example, 1623196493 + ... + 1623196526.

It is an arithmetic number, because the mean of its divisors is an integer number (14608768590).

Almost surely, 2^55188681323 is an apocalyptic number.

55188681323 is a deficient number, since it is larger than the sum of its proper divisors (3246393037).

55188681323 is a wasteful number, since it uses less digits than its factorization.

55188681323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3246393036.

The product of its digits is 1382400, while the sum is 50.

The spelling of 55188681323 in words is "fifty-five billion, one hundred eighty-eight million, six hundred eighty-one thousand, three hundred twenty-three".