55055545551 has 24 divisors (see below), whose sum is σ = 84234911904. Its totient is φ = 34531399680.

The previous prime is 55055545543. The next prime is 55055545577. The reversal of 55055545551 is 15554555055.

55055545551 is a `hidden beast` number, since 5 + 5 + 0 + 5 + 55 + 45 + 551 = 666.

It is not a de Polignac number, because 55055545551 - 2³ = 55055545543 is a prime.

It is a super-2 number, since 2×55055545551² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55055545497 and 55055545506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55055545541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 338806 + ... + 474236.

It is an arithmetic number, because the mean of its divisors is an integer number (3509787996).

Almost surely, 2^55055545551 is an apocalyptic number.

55055545551 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

55055545551 is a deficient number, since it is larger than the sum of its proper divisors (29179366353).

55055545551 is a wasteful number, since it uses less digits than its factorization.

55055545551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138111 (or 138108 counting only the distinct ones).

The product of its (nonzero) digits is 1562500, while the sum is 45.

The spelling of 55055545551 in words is "fifty-five billion, fifty-five million, five hundred forty-five thousand, five hundred fifty-one".