55489705447 has 32 divisors (see below), whose sum is σ = 67040893440. Its totient is φ = 45711864000.

The previous prime is 55489705391. The next prime is 55489705487. The reversal of 55489705447 is 74450798455.

It is not a de Polignac number, because 55489705447 - 2¹⁹ = 55489181159 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55489705391 and 55489705400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55489705487) 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 31 ways as a sum of consecutive naturals, for example, 533947 + ... + 629347.

It is an arithmetic number, because the mean of its divisors is an integer number (2095027920).

Almost surely, 2^55489705447 is an apocalyptic number.

55489705447 is a deficient number, since it is larger than the sum of its proper divisors (11551187993).

55489705447 is a wasteful number, since it uses less digits than its factorization.

55489705447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95476 (or 95454 counting only the distinct ones).

The product of its (nonzero) digits is 28224000, while the sum is 58.

The spelling of 55489705447 in words is "fifty-five billion, four hundred eighty-nine million, seven hundred five thousand, four hundred forty-seven".