55505500505551 has 8 divisors (see below), whose sum is σ = 59647702037040. Its totient is φ = 51460762539648.

The previous prime is 55505500505519. The next prime is 55505500505557. The reversal of 55505500505551 is 15550500550555.

It is a happy number.

55505500505551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 55505500505551 - 2⁵ = 55505500505519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55505500505557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24365890216 + ... + 24365892493.

It is an arithmetic number, because the mean of its divisors is an integer number (7455962754630).

Almost surely, 2^{55505500505551} is an apocalyptic number.

55505500505551 is a deficient number, since it is larger than the sum of its proper divisors (4142201531489).

55505500505551 is a wasteful number, since it uses less digits than its factorization.

55505500505551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48731782793.

The product of its (nonzero) digits is 1953125, while the sum is 46.

The spelling of 55505500505551 in words is "fifty-five trillion, five hundred five billion, five hundred million, five hundred five thousand, five hundred fifty-one".