55555050550506 has 256 divisors, whose sum is σ = 127568867328000. Its totient is φ = 15988427440128.

The previous prime is 55555050550367. The next prime is 55555050550553. The reversal of 55555050550506 is 60505505055555.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 23215648846 + ... + 23215651238.

It is an arithmetic number, because the mean of its divisors is an integer number (498315888000).

Almost surely, 2^{55555050550506} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55555050550506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63784433664000).

55555050550506 is an abundant number, since it is smaller than the sum of its proper divisors (72013816777494).

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

55555050550506 is a wasteful number, since it uses less digits than its factorization.

55555050550506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3205.

The product of its (nonzero) digits is 11718750, while the sum is 51.

The spelling of 55555050550506 in words is "fifty-five trillion, five hundred fifty-five billion, fifty million, five hundred fifty thousand, five hundred six".