55681630 has 24 divisors (see below), whose sum is σ = 106474968. Its totient is φ = 20961408.

The previous prime is 55681583. The next prime is 55681631. The reversal of 55681630 is 3618655.

55681630 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55681631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6744 + ... + 12523.

It is an arithmetic number, because the mean of its divisors is an integer number (4436457).

Almost surely, 2^55681630 is an apocalyptic number.

55681630 is a deficient number, since it is larger than the sum of its proper divisors (50793338).

55681630 is a wasteful number, since it uses less digits than its factorization.

55681630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19308 (or 19291 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 55681630 is about 7462.0124631362. The cubic root of 55681630 is about 381.8598345441.

The spelling of 55681630 in words is "fifty-five million, six hundred eighty-one thousand, six hundred thirty".