55645837 has 8 divisors (see below), whose sum is σ = 61859840. Its totient is φ = 49708080.

The previous prime is 55645831. The next prime is 55645841. The reversal of 55645837 is 73854655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55645837 - 2³ = 55645829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55645793 and 55645802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55645831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68637 + ... + 69442.

It is an arithmetic number, because the mean of its divisors is an integer number (7732480).

Almost surely, 2^55645837 is an apocalyptic number.

It is an amenable number.

55645837 is a deficient number, since it is larger than the sum of its proper divisors (6214003).

55645837 is a wasteful number, since it uses less digits than its factorization.

55645837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138123.

The product of its digits is 504000, while the sum is 43.

The square root of 55645837 is about 7459.6137299461. The cubic root of 55645837 is about 381.7779952328. Note that the first 3 decimals are identical.

The spelling of 55645837 in words is "fifty-five million, six hundred forty-five thousand, eight hundred thirty-seven".