55189563779 has 16 divisors (see below), whose sum is σ = 65208299520. Its totient is φ = 45709138080.

The previous prime is 55189563769. The next prime is 55189563787. The reversal of 55189563779 is 97736598155.

It is a cyclic number.

It is not a de Polignac number, because 55189563779 - 2⁴ = 55189563763 is a prime.

It is a Smith number, since the sum of its digits (65) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (55189563769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53039 + ... + 336440.

It is an arithmetic number, because the mean of its divisors is an integer number (4075518720).

Almost surely, 2^55189563779 is an apocalyptic number.

55189563779 is a deficient number, since it is larger than the sum of its proper divisors (10018735741).

55189563779 is a wasteful number, since it uses less digits than its factorization.

55189563779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390170.

The product of its digits is 71442000, while the sum is 65.

The spelling of 55189563779 in words is "fifty-five billion, one hundred eighty-nine million, five hundred sixty-three thousand, seven hundred seventy-nine".