55776656 has 80 divisors (see below), whose sum is σ = 123742080. Its totient is φ = 24161280.

The previous prime is 55776641. The next prime is 55776661. The reversal of 55776656 is 65667755.

It is a super-2 number, since 2×55776656² = 6222070709084672, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55776656.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 425711 + ... + 425841.

It is an arithmetic number, because the mean of its divisors is an integer number (1546776).

Almost surely, 2^55776656 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 55776656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61871040).

55776656 is an abundant number, since it is smaller than the sum of its proper divisors (67965424).

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

55776656 is a wasteful number, since it uses less digits than its factorization.

55776656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264 (or 258 counting only the distinct ones).

The product of its digits is 1323000, while the sum is 47.

The square root of 55776656 is about 7468.3770660030. The cubic root of 55776656 is about 382.0769378030.

The spelling of 55776656 in words is "fifty-five million, seven hundred seventy-six thousand, six hundred fifty-six".