55389577 has 4 divisors (see below), whose sum is σ = 55409220. Its totient is φ = 55369936.

The previous prime is 55389571. The next prime is 55389661. The reversal of 55389577 is 77598355.

55389577 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 can be written as a sum of positive squares in 2 ways, for example, as 53231616 + 2157961 = 7296^2 + 1469^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55389577 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55389577.

It is not an unprimeable number, because it can be changed into a prime (55389571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4702 + ... + 11527.

It is an arithmetic number, because the mean of its divisors is an integer number (13852305).

Almost surely, 2^55389577 is an apocalyptic number.

It is an amenable number.

55389577 is a deficient number, since it is larger than the sum of its proper divisors (19643).

55389577 is a wasteful number, since it uses less digits than its factorization.

55389577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19642.

The product of its digits is 1323000, while the sum is 49.

The square root of 55389577 is about 7442.4174164044. The cubic root of 55389577 is about 381.1910390949.

It can be divided in two parts, 553 and 89577, that multiplied together give a triangular number (49536081 = T₉₉₅₃).

The spelling of 55389577 in words is "fifty-five million, three hundred eighty-nine thousand, five hundred seventy-seven".