55805544 has 128 divisors (see below), whose sum is σ = 165888000. Its totient is φ = 17341632.

The previous prime is 55805537. The next prime is 55805557. The reversal of 55805544 is 44550855.

It is a super-2 number, since 2×55805544² = 6228517482271872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 55805499 and 55805508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 233377 + ... + 233615.

It is an arithmetic number, because the mean of its divisors is an integer number (1296000).

Almost surely, 2^55805544 is an apocalyptic number.

55805544 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55805544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82944000).

55805544 is an abundant number, since it is smaller than the sum of its proper divisors (110082456).

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

55805544 is a wasteful number, since it uses less digits than its factorization.

55805544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324 (or 314 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 36.

The square root of 55805544 is about 7470.3108369063. The cubic root of 55805544 is about 382.1428885334.

The spelling of 55805544 in words is "fifty-five million, eight hundred five thousand, five hundred forty-four".