55388831052645 has 160 divisors (see below), whose sum is σ = 104979160218240. Its totient is φ = 27908832061440.

The previous prime is 55388831052629. The next prime is 55388831052647. The reversal of 55388831052645 is 54625013888355.

It is a happy number.

55388831052645 is a `hidden beast` number, since 5 + 5 + 38 + 8 + 8 + 31 + 0 + 526 + 45 = 666.

55388831052645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55388831052645 - 2⁴ = 55388831052629 is a prime.

It is a super-2 number, since 2×55388831052645² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55388831052647) 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 159 ways as a sum of consecutive naturals, for example, 65217649 + ... + 66061481.

It is an arithmetic number, because the mean of its divisors is an integer number (656119751364).

Almost surely, 2^{55388831052645} is an apocalyptic number.

It is an amenable number.

55388831052645 is a deficient number, since it is larger than the sum of its proper divisors (49590329165595).

55388831052645 is a wasteful number, since it uses less digits than its factorization.

55388831052645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844017 (or 844008 counting only the distinct ones).

The product of its (nonzero) digits is 138240000, while the sum is 63.

The spelling of 55388831052645 in words is "fifty-five trillion, three hundred eighty-eight billion, eight hundred thirty-one million, fifty-two thousand, six hundred forty-five".