55630645 has 16 divisors (see below), whose sum is σ = 78156288. Its totient is φ = 37215360.

The previous prime is 55630643. The next prime is 55630717. The reversal of 55630645 is 54603655.

It is not a de Polignac number, because 55630645 - 2¹ = 55630643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55630645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55630643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17949 + ... + 20818.

It is an arithmetic number, because the mean of its divisors is an integer number (4884768).

Almost surely, 2^55630645 is an apocalyptic number.

It is an amenable number.

55630645 is a deficient number, since it is larger than the sum of its proper divisors (22525643).

55630645 is a wasteful number, since it uses less digits than its factorization.

55630645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38820.

The product of its (nonzero) digits is 54000, while the sum is 34.

The square root of 55630645 is about 7458.5953771471. The cubic root of 55630645 is about 381.7432487030.

The spelling of 55630645 in words is "fifty-five million, six hundred thirty thousand, six hundred forty-five".