55555551355751 has 4 divisors (see below), whose sum is σ = 55555566274392. Its totient is φ = 55555536437112.

The previous prime is 55555551355747. The next prime is 55555551355763. The reversal of 55555551355751 is 15755315555555.

It is a happy number.

55555551355751 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 55555551355751 - 2² = 55555551355747 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 (55555551355351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3290021 + ... + 11042433.

It is an arithmetic number, because the mean of its divisors is an integer number (13888891568598).

Almost surely, 2^{55555551355751} is an apocalyptic number.

55555551355751 is a deficient number, since it is larger than the sum of its proper divisors (14918641).

55555551355751 is an equidigital number, since it uses as much as digits as its factorization.

55555551355751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14918640.

The product of its digits is 205078125, while the sum is 62.

The spelling of 55555551355751 in words is "fifty-five trillion, five hundred fifty-five billion, five hundred fifty-one million, three hundred fifty-five thousand, seven hundred fifty-one".