55646320009 has 24 divisors (see below), whose sum is σ = 65907803520. Its totient is φ = 46021769472.

The previous prime is 55646319961. The next prime is 55646320021. The reversal of 55646320009 is 90002364655.

It is not a de Polignac number, because 55646320009 - 2⁷ = 55646319881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55646323009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15357372 + ... + 15360994.

It is an arithmetic number, because the mean of its divisors is an integer number (2746158480).

Almost surely, 2^55646320009 is an apocalyptic number.

It is an amenable number.

55646320009 is a deficient number, since it is larger than the sum of its proper divisors (10261483511).

55646320009 is a wasteful number, since it uses less digits than its factorization.

55646320009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6297 (or 6268 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 40.

The spelling of 55646320009 in words is "fifty-five billion, six hundred forty-six million, three hundred twenty thousand, nine".