1850720987136 has 288 divisors, whose sum is σ = 6041713860000. Its totient is φ = 500945485824.

The previous prime is 1850720987119. The next prime is 1850720987147. The reversal of 1850720987136 is 6317890270581.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (57).

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 23 ways as a sum of consecutive naturals, for example, 5558290 + ... + 5881838.

It is an arithmetic number, because the mean of its divisors is an integer number (20978173125).

Almost surely, 2^{1850720987136} is an apocalyptic number.

1850720987136 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 1850720987136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3020856930000).

1850720987136 is an abundant number, since it is smaller than the sum of its proper divisors (4190992872864).

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

1850720987136 is a wasteful number, since it uses less digits than its factorization.

1850720987136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323607 (or 323580 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 57.

The spelling of 1850720987136 in words is "one trillion, eight hundred fifty billion, seven hundred twenty million, nine hundred eighty-seven thousand, one hundred thirty-six".