55555120403 has 16 divisors (see below), whose sum is σ = 61442297280. Its totient is φ = 49993982976.

The previous prime is 55555120399. The next prime is 55555120447. The reversal of 55555120403 is 30402155555.

It is not a de Polignac number, because 55555120403 - 2² = 55555120399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55555128403) 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, 496250 + ... + 597807.

It is an arithmetic number, because the mean of its divisors is an integer number (3840143580).

Almost surely, 2^55555120403 is an apocalyptic number.

55555120403 is a deficient number, since it is larger than the sum of its proper divisors (5887176877).

55555120403 is a wasteful number, since it uses less digits than its factorization.

55555120403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094206.

The product of its (nonzero) digits is 75000, while the sum is 35.

Adding to 55555120403 its reverse (30402155555), we get a palindrome (85957275958).

The spelling of 55555120403 in words is "fifty-five billion, five hundred fifty-five million, one hundred twenty thousand, four hundred three".