55418905 has 8 divisors (see below), whose sum is σ = 66624192. Its totient is φ = 44254128.

The previous prime is 55418903. The next prime is 55418977. The reversal of 55418905 is 50981455.

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 55418905 - 2¹ = 55418903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55418903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7029 + ... + 12658.

It is an arithmetic number, because the mean of its divisors is an integer number (8328024).

Almost surely, 2^55418905 is an apocalyptic number.

It is an amenable number.

55418905 is a deficient number, since it is larger than the sum of its proper divisors (11205287).

55418905 is a wasteful number, since it uses less digits than its factorization.

55418905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20255.

The product of its (nonzero) digits is 36000, while the sum is 37.

The square root of 55418905 is about 7444.3874831983. The cubic root of 55418905 is about 381.2583056508.

The spelling of 55418905 in words is "fifty-five million, four hundred eighteen thousand, nine hundred five".