55503789 has 24 divisors (see below), whose sum is σ = 82162080. Its totient is φ = 33300960.

The previous prime is 55503787. The next prime is 55503797. The reversal of 55503789 is 98730555.

It is not a de Polignac number, because 55503789 - 2¹ = 55503787 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55503789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55503787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38127 + ... + 39555.

It is an arithmetic number, because the mean of its divisors is an integer number (3423420).

Almost surely, 2^55503789 is an apocalyptic number.

It is an amenable number.

55503789 is a deficient number, since it is larger than the sum of its proper divisors (26658291).

55503789 is a wasteful number, since it uses less digits than its factorization.

55503789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561 (or 1550 counting only the distinct ones).

The product of its (nonzero) digits is 189000, while the sum is 42.

The square root of 55503789 is about 7450.0865095648. The cubic root of 55503789 is about 381.4528615276.

It can be divided in two parts, 5550 and 3789, that added together give a palindrome (9339).

The spelling of 55503789 in words is "fifty-five million, five hundred three thousand, seven hundred eighty-nine".