18150816871782 has 144 divisors (see below), whose sum is σ = 48425549412240. Its totient is φ = 4890676904064.

The previous prime is 18150816871729. The next prime is 18150816871813. The reversal of 18150816871782 is 28717861805181.

It is a super-2 number, since 2×18150816871782² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 7151613 + ... + 9351320.

It is an arithmetic number, because the mean of its divisors is an integer number (336288537585).

Almost surely, 2^{18150816871782} is an apocalyptic number.

18150816871782 is an abundant number, since it is smaller than the sum of its proper divisors (30274732540458).

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

18150816871782 is a wasteful number, since it uses less digits than its factorization.

18150816871782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16503027 (or 16503017 counting only the distinct ones).

The product of its (nonzero) digits is 12042240, while the sum is 63.

The spelling of 18150816871782 in words is "eighteen trillion, one hundred fifty billion, eight hundred sixteen million, eight hundred seventy-one thousand, seven hundred eighty-two".