55784421871903 has 4 divisors (see below), whose sum is σ = 57292108949560. Its totient is φ = 54276734794248.

The previous prime is 55784421871897. The next prime is 55784421871921. The reversal of 55784421871903 is 30917812448755.

It is a happy number.

55784421871903 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55784421871903 - 2¹³ = 55784421863711 is a prime.

It is a super-2 number, since 2×55784421871903² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55784421871963) 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 3 ways as a sum of consecutive naturals, for example, 753843538773 + ... + 753843538846.

It is an arithmetic number, because the mean of its divisors is an integer number (14323027237390).

Almost surely, 2^{55784421871903} is an apocalyptic number.

55784421871903 is a deficient number, since it is larger than the sum of its proper divisors (1507687077657).

55784421871903 is a wasteful number, since it uses less digits than its factorization.

55784421871903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507687077656.

The product of its (nonzero) digits is 67737600, while the sum is 64.

The spelling of 55784421871903 in words is "fifty-five trillion, seven hundred eighty-four billion, four hundred twenty-one million, eight hundred seventy-one thousand, nine hundred three".