18580185556540 has 12 divisors (see below), whose sum is σ = 39018389668776. Its totient is φ = 7432074222608.

The previous prime is 18580185556529. The next prime is 18580185556547. The reversal of 18580185556540 is 4565558108581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18580185556547) 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 3 ways as a sum of consecutive naturals, for example, 464504638894 + ... + 464504638933.

It is an arithmetic number, because the mean of its divisors is an integer number (3251532472398).

Almost surely, 2^{18580185556540} is an apocalyptic number.

18580185556540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18580185556540 is an abundant number, since it is smaller than the sum of its proper divisors (20438204112236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18580185556540 is a wasteful number, since it uses less digits than its factorization.

18580185556540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929009277836 (or 929009277834 counting only the distinct ones).

The product of its (nonzero) digits is 38400000, while the sum is 61.

The spelling of 18580185556540 in words is "eighteen trillion, five hundred eighty billion, one hundred eighty-five million, five hundred fifty-six thousand, five hundred forty".