55547218506 has 32 divisors (see below), whose sum is σ = 120081685248. Its totient is φ = 17028377280.

The previous prime is 55547218501. The next prime is 55547218513. The reversal of 55547218506 is 60581274555.

It is not an unprimeable number, because it can be changed into a prime (55547218501) 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, 1292781 + ... + 1335056.

It is an arithmetic number, because the mean of its divisors is an integer number (3752552664).

Almost surely, 2^55547218506 is an apocalyptic number.

55547218506 is an abundant number, since it is smaller than the sum of its proper divisors (64534466742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55547218506 is a wasteful number, since it uses less digits than its factorization.

55547218506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2628126.

The product of its (nonzero) digits is 1680000, while the sum is 48.

The spelling of 55547218506 in words is "fifty-five billion, five hundred forty-seven million, two hundred eighteen thousand, five hundred six".