55019216123 has 16 divisors (see below), whose sum is σ = 58287146400. Its totient is φ = 51788897280.

The previous prime is 55019216107. The next prime is 55019216137. The reversal of 55019216123 is 32161291055.

It is a cyclic number.

It is not a de Polignac number, because 55019216123 - 2⁴ = 55019216107 is a prime.

It is a super-2 number, since 2×55019216123² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55009216123) 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 15 ways as a sum of consecutive naturals, for example, 6204713 + ... + 6213573.

It is an arithmetic number, because the mean of its divisors is an integer number (3642946650).

Almost surely, 2^55019216123 is an apocalyptic number.

55019216123 is a deficient number, since it is larger than the sum of its proper divisors (3267930277).

55019216123 is a wasteful number, since it uses less digits than its factorization.

55019216123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10942.

The product of its (nonzero) digits is 16200, while the sum is 35.

The spelling of 55019216123 in words is "fifty-five billion, nineteen million, two hundred sixteen thousand, one hundred twenty-three".