55421109766 has 32 divisors (see below), whose sum is σ = 95882901120. Its totient is φ = 23760374400.

The previous prime is 55421109719. The next prime is 55421109769. The reversal of 55421109766 is 66790112455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55421109769) 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, 197155 + ... + 386926.

It is an arithmetic number, because the mean of its divisors is an integer number (2996340660).

Almost surely, 2^55421109766 is an apocalyptic number.

55421109766 is a deficient number, since it is larger than the sum of its proper divisors (40461791354).

55421109766 is a wasteful number, since it uses less digits than its factorization.

55421109766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584340.

The product of its (nonzero) digits is 453600, while the sum is 46.

The spelling of 55421109766 in words is "fifty-five billion, four hundred twenty-one million, one hundred nine thousand, seven hundred sixty-six".