55643136 has 88 divisors (see below), whose sum is σ = 151314240. Its totient is φ = 18173952.

The previous prime is 55643129. The next prime is 55643143. The reversal of 55643136 is 63134655.

It is an interprime number because it is at equal distance from previous prime (55643129) and next prime (55643143).

It is a junction number, because it is equal to n+sod(n) for n = 55643097 and 55643106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181095 + ... + 181401.

It is an arithmetic number, because the mean of its divisors is an integer number (1719480).

Almost surely, 2^55643136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55643136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75657120).

55643136 is an abundant number, since it is smaller than the sum of its proper divisors (95671104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55643136 is a wasteful number, since it uses less digits than its factorization.

55643136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389 (or 371 counting only the distinct ones).

The product of its digits is 32400, while the sum is 33.

The square root of 55643136 is about 7459.4326862034. The cubic root of 55643136 is about 381.7718180768.

The spelling of 55643136 in words is "fifty-five million, six hundred forty-three thousand, one hundred thirty-six".