18139192835440 has 80 divisors (see below), whose sum is σ = 44394122656800. Its totient is φ = 6873670112256.

The previous prime is 18139192835399. The next prime is 18139192835479. The reversal of 18139192835440 is 4453829193181.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 131461206 + ... + 131599114.

It is an arithmetic number, because the mean of its divisors is an integer number (554926533210).

Almost surely, 2^{18139192835440} is an apocalyptic number.

18139192835440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18139192835440 is an abundant number, since it is smaller than the sum of its proper divisors (26254929821360).

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

18139192835440 is a wasteful number, since it uses less digits than its factorization.

18139192835440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224474 (or 224468 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 58.

The spelling of 18139192835440 in words is "eighteen trillion, one hundred thirty-nine billion, one hundred ninety-two million, eight hundred thirty-five thousand, four hundred forty".