55505050005551 has 12 divisors (see below), whose sum is σ = 58994035690128. Its totient is φ = 52211762833152.

The previous prime is 55505050005527. The next prime is 55505050005667. The reversal of 55505050005551 is 15550005050555.

It is not a de Polignac number, because 55505050005551 - 2¹⁴ = 55505049989167 is a prime.

It is a super-2 number, since 2×55505050005551² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55505050005499 and 55505050005508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55505050205551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51458366 + ... + 52525931.

It is an arithmetic number, because the mean of its divisors is an integer number (4916169640844).

Almost surely, 2^{55505050005551} is an apocalyptic number.

55505050005551 is a deficient number, since it is larger than the sum of its proper divisors (3488985684577).

55505050005551 is a wasteful number, since it uses less digits than its factorization.

55505050005551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103986178 (or 103986161 counting only the distinct ones).

The product of its (nonzero) digits is 390625, while the sum is 41.

The spelling of 55505050005551 in words is "fifty-five trillion, five hundred five billion, fifty million, five thousand, five hundred fifty-one".