18169357940540 has 24 divisors (see below), whose sum is σ = 38336484156432. Its totient is φ = 7233298894080.

The previous prime is 18169357940537. The next prime is 18169357940581. The reversal of 18169357940540 is 4504975396181.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2152763309 + ... + 2152771748.

It is an arithmetic number, because the mean of its divisors is an integer number (1597353506518).

Almost surely, 2^{18169357940540} is an apocalyptic number.

18169357940540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18169357940540 is an abundant number, since it is smaller than the sum of its proper divisors (20167126215892).

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

18169357940540 is a wasteful number, since it uses less digits than its factorization.

18169357940540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4305535277 (or 4305535275 counting only the distinct ones).

The product of its (nonzero) digits is 32659200, while the sum is 62.

The spelling of 18169357940540 in words is "eighteen trillion, one hundred sixty-nine billion, three hundred fifty-seven million, nine hundred forty thousand, five hundred forty".