55055055005551 has 4 divisors (see below), whose sum is σ = 55056646640704. Its totient is φ = 55053463370400.

The previous prime is 55055055005543. The next prime is 55055055005627. The reversal of 55055055005551 is 15550055055055.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55055055005551 - 2³ = 55055055005543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55055055105551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 795765690 + ... + 795834871.

It is an arithmetic number, because the mean of its divisors is an integer number (13764161660176).

Almost surely, 2^{55055055005551} is an apocalyptic number.

55055055005551 is a deficient number, since it is larger than the sum of its proper divisors (1591635153).

55055055005551 is a wasteful number, since it uses less digits than its factorization.

55055055005551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1591635152.

The product of its (nonzero) digits is 1953125, while the sum is 46.

The spelling of 55055055005551 in words is "fifty-five trillion, fifty-five billion, fifty-five million, five thousand, five hundred fifty-one".