55050505551 has 40 divisors (see below), whose sum is σ = 86610783600. Its totient is φ = 34750010880.

The previous prime is 55050505511. The next prime is 55050505553. The reversal of 55050505551 is 15550505055.

It is a happy number.

55050505551 is a `hidden beast` number, since 5 + 5 + 0 + 50 + 50 + 5 + 551 = 666.

It is not a de Polignac number, because 55050505551 - 2⁶ = 55050505487 is a prime.

It is a super-2 number, since 2×55050505551² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55050505553) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3194065 + ... + 3211253.

It is an arithmetic number, because the mean of its divisors is an integer number (2165269590).

Almost surely, 2^55050505551 is an apocalyptic number.

55050505551 is a deficient number, since it is larger than the sum of its proper divisors (31560278049).

55050505551 is a wasteful number, since it uses less digits than its factorization.

55050505551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19301 (or 19292 counting only the distinct ones).

The product of its (nonzero) digits is 78125, while the sum is 36.

The spelling of 55050505551 in words is "fifty-five billion, fifty million, five hundred five thousand, five hundred fifty-one".