16581074055 has 64 divisors (see below), whose sum is σ = 32697907200. Its totient is φ = 6987004416.

The previous prime is 16581074053. The next prime is 16581074057. The reversal of 16581074055 is 55047018561.

It is an interprime number because it is at equal distance from previous prime (16581074053) and next prime (16581074057).

It is not a de Polignac number, because 16581074055 - 2¹ = 16581074053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16581073998 and 16581074016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16581074051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1006021 + ... + 1022369.

It is an arithmetic number, because the mean of its divisors is an integer number (510904800).

Almost surely, 2^16581074055 is an apocalyptic number.

16581074055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16581074055 is a deficient number, since it is larger than the sum of its proper divisors (16116833145).

16581074055 is a wasteful number, since it uses less digits than its factorization.

16581074055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17120.

The product of its (nonzero) digits is 168000, while the sum is 42.

The spelling of 16581074055 in words is "sixteen billion, five hundred eighty-one million, seventy-four thousand, fifty-five".