55505050551 has 8 divisors (see below), whose sum is σ = 82229704560. Its totient is φ = 37003367016.

The previous prime is 55505050543. The next prime is 55505050553. The reversal of 55505050551 is 15505050555.

It is a happy number.

55505050551 is a `hidden beast` number, since 5 + 5 + 5 + 0 + 50 + 50 + 551 = 666.

It is not a de Polignac number, because 55505050551 - 2³ = 55505050543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55505050553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1027871280 + ... + 1027871333.

It is an arithmetic number, because the mean of its divisors is an integer number (10278713070).

Almost surely, 2^55505050551 is an apocalyptic number.

55505050551 is a deficient number, since it is larger than the sum of its proper divisors (26724654009).

55505050551 is a wasteful number, since it uses less digits than its factorization.

55505050551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2055742622 (or 2055742616 counting only the distinct ones).

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

The spelling of 55505050551 in words is "fifty-five billion, five hundred five million, fifty thousand, five hundred fifty-one".