55784845 has 8 divisors (see below), whose sum is σ = 66988440. Its totient is φ = 44596800.

The previous prime is 55784843. The next prime is 55784849. The reversal of 55784845 is 54848755.

It can be written as a sum of positive squares in 4 ways, for example, as 1408969 + 54375876 = 1187^2 + 7374^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55784845 - 2¹ = 55784843 is a prime.

It is a super-2 number, since 2×55784845² = 6223897863348050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55784795 and 55784804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55784843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6571 + ... + 12439.

It is an arithmetic number, because the mean of its divisors is an integer number (8373555).

Almost surely, 2^55784845 is an apocalyptic number.

It is an amenable number.

55784845 is a deficient number, since it is larger than the sum of its proper divisors (11203595).

55784845 is a wasteful number, since it uses less digits than its factorization.

55784845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7775.

The product of its digits is 896000, while the sum is 46.

The square root of 55784845 is about 7468.9252908300. The cubic root of 55784845 is about 382.0956354396.

Subtracting from 55784845 its product of digits (896000), we obtain a palindrome (54888845).

The spelling of 55784845 in words is "fifty-five million, seven hundred eighty-four thousand, eight hundred forty-five".