55505105551 has 8 divisors (see below), whose sum is σ = 64088370080. Its totient is φ = 47085331968.

The previous prime is 55505105549. The next prime is 55505105569. The reversal of 55505105551 is 15550150555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55505105551 - 2¹ = 55505105549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55505105551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55505105531) 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, 40872006 + ... + 40873363.

It is an arithmetic number, because the mean of its divisors is an integer number (8011046260).

Almost surely, 2^55505105551 is an apocalyptic number.

55505105551 is a deficient number, since it is larger than the sum of its proper divisors (8583264529).

55505105551 is an equidigital number, since it uses as much as digits as its factorization.

55505105551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81745473.

The product of its (nonzero) digits is 78125, while the sum is 37.

The spelling of 55505105551 in words is "fifty-five billion, five hundred five million, one hundred five thousand, five hundred fifty-one".