18056161009536 has 512 divisors, whose sum is σ = 56298175718400. Its totient is φ = 5076576239616.

The previous prime is 18056161009511. The next prime is 18056161009541. The reversal of 18056161009536 is 63590016165081.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 609393570 + ... + 609423198.

It is an arithmetic number, because the mean of its divisors is an integer number (109957374450).

Almost surely, 2^{18056161009536} is an apocalyptic number.

18056161009536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18056161009536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28149087859200).

18056161009536 is an abundant number, since it is smaller than the sum of its proper divisors (38242014708864).

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

18056161009536 is a wasteful number, since it uses less digits than its factorization.

18056161009536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29886 (or 29874 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 51.

The spelling of 18056161009536 in words is "eighteen trillion, fifty-six billion, one hundred sixty-one million, nine thousand, five hundred thirty-six".