55330450503 has 16 divisors (see below), whose sum is σ = 78859097856. Its totient is φ = 34422618560.

The previous prime is 55330450459. The next prime is 55330450517. The reversal of 55330450503 is 30505403355.

It is a cyclic number.

It is not a de Polignac number, because 55330450503 - 2⁸ = 55330450247 is a prime.

It is a super-2 number, since 2×55330450503² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55330450583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9776325 + ... + 9781982.

It is an arithmetic number, because the mean of its divisors is an integer number (4928693616).

Almost surely, 2^55330450503 is an apocalyptic number.

55330450503 is a deficient number, since it is larger than the sum of its proper divisors (23528647353).

55330450503 is a wasteful number, since it uses less digits than its factorization.

55330450503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19558374.

The product of its (nonzero) digits is 67500, while the sum is 33.

Adding to 55330450503 its reverse (30505403355), we get a palindrome (85835853858).

The spelling of 55330450503 in words is "fifty-five billion, three hundred thirty million, four hundred fifty thousand, five hundred three".