55661632 has 56 divisors (see below), whose sum is σ = 120015000. Its totient is φ = 25460736.

The previous prime is 55661629. The next prime is 55661699. The reversal of 55661632 is 23616655.

It can be written as a sum of positive squares in 4 ways, for example, as 69696 + 55591936 = 264^2 + 7456^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123744 + ... + 124192.

It is an arithmetic number, because the mean of its divisors is an integer number (2143125).

Almost surely, 2^55661632 is an apocalyptic number.

55661632 is a gapful number since it is divisible by the number (52) 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 55661632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60007500).

55661632 is an abundant number, since it is smaller than the sum of its proper divisors (64353368).

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

55661632 is a wasteful number, since it uses less digits than its factorization.

55661632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623 (or 613 counting only the distinct ones).

The product of its digits is 32400, while the sum is 34.

The square root of 55661632 is about 7460.6723557599. The cubic root of 55661632 is about 381.8141142149.

The spelling of 55661632 in words is "fifty-five million, six hundred sixty-one thousand, six hundred thirty-two".