55477844 has 6 divisors (see below), whose sum is σ = 97086234. Its totient is φ = 27738920.

The previous prime is 55477843. The next prime is 55477859. The reversal of 55477844 is 44877455.

It can be written as a sum of positive squares in only one way, i.e., 41113744 + 14364100 = 6412^2 + 3790^2 .

It is a junction number, because it is equal to n+sod(n) for n = 55477795 and 55477804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55477843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6934727 + ... + 6934734.

It is an arithmetic number, because the mean of its divisors is an integer number (16181039).

Almost surely, 2^55477844 is an apocalyptic number.

It is an amenable number.

55477844 is a deficient number, since it is larger than the sum of its proper divisors (41608390).

55477844 is a wasteful number, since it uses less digits than its factorization.

55477844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13869465 (or 13869463 counting only the distinct ones).

The product of its digits is 627200, while the sum is 44.

The square root of 55477844 is about 7448.3450510835. The cubic root of 55477844 is about 381.3934161147.

The spelling of 55477844 in words is "fifty-five million, four hundred seventy-seven thousand, eight hundred forty-four".