55505555506 has 16 divisors (see below), whose sum is σ = 86920521984. Its totient is φ = 26533222144.

The previous prime is 55505555491. The next prime is 55505555507. The reversal of 55505555506 is 60555550555.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (55505555507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197551 + ... + 387346.

It is an arithmetic number, because the mean of its divisors is an integer number (5432532624).

Almost surely, 2^55505555506 is an apocalyptic number.

55505555506 is a deficient number, since it is larger than the sum of its proper divisors (31414966478).

55505555506 is a wasteful number, since it uses less digits than its factorization.

55505555506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586985.

The product of its (nonzero) digits is 2343750, while the sum is 46.

The spelling of 55505555506 in words is "fifty-five billion, five hundred five million, five hundred fifty-five thousand, five hundred six".