55555212006 has 96 divisors (see below), whose sum is σ = 138339871488. Its totient is φ = 15783768000.

The previous prime is 55555212001. The next prime is 55555212007. The reversal of 55555212006 is 60021255555.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55555212001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27735001 + ... + 27737003.

It is an arithmetic number, because the mean of its divisors is an integer number (1441040328).

Almost surely, 2^55555212006 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55555212006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69169935744).

55555212006 is an abundant number, since it is smaller than the sum of its proper divisors (82784659482).

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

55555212006 is a wasteful number, since it uses less digits than its factorization.

55555212006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3146 (or 3143 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 36.

The spelling of 55555212006 in words is "fifty-five billion, five hundred fifty-five million, two hundred twelve thousand, six".