55500578566 has 16 divisors (see below), whose sum is σ = 86481950400. Its totient is φ = 26681269888.

The previous prime is 55500578563. The next prime is 55500578587. The reversal of 55500578566 is 66587500555.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55500578563) 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 7 ways as a sum of consecutive naturals, for example, 1988035 + ... + 2015758.

It is an arithmetic number, because the mean of its divisors is an integer number (5405121900).

Almost surely, 2^55500578566 is an apocalyptic number.

55500578566 is a deficient number, since it is larger than the sum of its proper divisors (30981371834).

55500578566 is a wasteful number, since it uses less digits than its factorization.

55500578566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4004063.

The product of its (nonzero) digits is 6300000, while the sum is 52.

The spelling of 55500578566 in words is "fifty-five billion, five hundred million, five hundred seventy-eight thousand, five hundred sixty-six".