55771248566 has 16 divisors (see below), whose sum is σ = 91270263888. Its totient is φ = 25348284000.

The previous prime is 55771248563. The next prime is 55771248581. The reversal of 55771248566 is 66584217755.

It is a super-2 number, since 2×55771248566² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55771248563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149096 + ... + 365748.

It is an arithmetic number, because the mean of its divisors is an integer number (5704391493).

Almost surely, 2^55771248566 is an apocalyptic number.

55771248566 is a deficient number, since it is larger than the sum of its proper divisors (35499015322).

55771248566 is a wasteful number, since it uses less digits than its factorization.

55771248566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228367.

The product of its digits is 14112000, while the sum is 56.

The spelling of 55771248566 in words is "fifty-five billion, seven hundred seventy-one million, two hundred forty-eight thousand, five hundred sixty-six".