55545505551 has 6 divisors (see below), whose sum is σ = 80232396920. Its totient is φ = 37030337028.

The previous prime is 55545505529. The next prime is 55545505591. The reversal of 55545505551 is 15550554555.

55545505551 is a `hidden beast` number, since 5 + 5 + 5 + 45 + 50 + 5 + 551 = 666.

It is not a de Polignac number, because 55545505551 - 2⁶ = 55545505487 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55545505497 and 55545505506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55545505591) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3085861411 + ... + 3085861428.

Almost surely, 2^55545505551 is an apocalyptic number.

55545505551 is a deficient number, since it is larger than the sum of its proper divisors (24686891369).

55545505551 is a wasteful number, since it uses less digits than its factorization.

55545505551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6171722845 (or 6171722842 counting only the distinct ones).

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

The spelling of 55545505551 in words is "fifty-five billion, five hundred forty-five million, five hundred five thousand, five hundred fifty-one".