55153085581 has 16 divisors (see below), whose sum is σ = 60962223168. Its totient is φ = 49477881600.

The previous prime is 55153085557. The next prime is 55153085587. The reversal of 55153085581 is 18558035155.

55153085581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 55153085581 - 2¹¹ = 55153083533 is a prime.

It is a super-2 number, since 2×55153085581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55153085587) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 766261 + ... + 835141.

It is an arithmetic number, because the mean of its divisors is an integer number (3810138948).

Almost surely, 2^55153085581 is an apocalyptic number.

It is an amenable number.

55153085581 is a deficient number, since it is larger than the sum of its proper divisors (5809137587).

55153085581 is a wasteful number, since it uses less digits than its factorization.

55153085581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69852.

The product of its (nonzero) digits is 600000, while the sum is 46.

The spelling of 55153085581 in words is "fifty-five billion, one hundred fifty-three million, eighty-five thousand, five hundred eighty-one".