55516473985 has 12 divisors (see below), whose sum is σ = 77496466068. Its totient is φ = 38068439136.

The previous prime is 55516473967. The next prime is 55516473989. The reversal of 55516473985 is 58937461555.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21788416881 + 33728057104 = 147609^2 + 183652^2 .

It is not a de Polignac number, because 55516473985 - 2¹³ = 55516465793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55516473989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113298682 + ... + 113299171.

It is an arithmetic number, because the mean of its divisors is an integer number (6458038839).

Almost surely, 2^55516473985 is an apocalyptic number.

It is an amenable number.

55516473985 is a deficient number, since it is larger than the sum of its proper divisors (21979992083).

55516473985 is a wasteful number, since it uses less digits than its factorization.

55516473985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226597872 (or 226597865 counting only the distinct ones).

The product of its digits is 22680000, while the sum is 58.

The spelling of 55516473985 in words is "fifty-five billion, five hundred sixteen million, four hundred seventy-three thousand, nine hundred eighty-five".