55690656 has 72 divisors (see below), whose sum is σ = 170069760. Its totient is φ = 15910272.

The previous prime is 55690619. The next prime is 55690673. The reversal of 55690656 is 65609655.

It is a Harshad number since it is a multiple of its sum of digits (42).

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 11 ways as a sum of consecutive naturals, for example, 1216 + ... + 10623.

It is an arithmetic number, because the mean of its divisors is an integer number (2362080).

Almost surely, 2^55690656 is an apocalyptic number.

55690656 is a gapful number since it is divisible by the number (56) 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 55690656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85034880).

55690656 is an abundant number, since it is smaller than the sum of its proper divisors (114379104).

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

55690656 is a wasteful number, since it uses less digits than its factorization.

55690656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11866 (or 11851 counting only the distinct ones).

The product of its (nonzero) digits is 243000, while the sum is 42.

The square root of 55690656 is about 7462.6172352600. The cubic root of 55690656 is about 381.8804666068.

The spelling of 55690656 in words is "fifty-five million, six hundred ninety thousand, six hundred fifty-six".