55446009 has 16 divisors (see below), whose sum is σ = 78554880. Its totient is φ = 34687440.

The previous prime is 55445989. The next prime is 55446019. The reversal of 55446009 is 90064455.

It is not a de Polignac number, because 55446009 - 2⁹ = 55445497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55446019) 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, 1554 + ... + 10644.

It is an arithmetic number, because the mean of its divisors is an integer number (4909680).

Almost surely, 2^55446009 is an apocalyptic number.

It is an amenable number.

55446009 is a deficient number, since it is larger than the sum of its proper divisors (23108871).

55446009 is a wasteful number, since it uses less digits than its factorization.

55446009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9220.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 55446009 is about 7446.2076925103. The cubic root of 55446009 is about 381.3204501539.

The spelling of 55446009 in words is "fifty-five million, four hundred forty-six thousand, nine".