1856930121728 has 96 divisors (see below), whose sum is σ = 4051838700000. Its totient is φ = 843779112960.

The previous prime is 1856930121713. The next prime is 1856930121731. The reversal of 1856930121728 is 8271210396581.

It is a self number, because there is not a number n which added to its sum of digits gives 1856930121728.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77687123 + ... + 77711021.

It is an arithmetic number, because the mean of its divisors is an integer number (42206653125).

Almost surely, 2^{1856930121728} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1856930121728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2025919350000).

1856930121728 is an abundant number, since it is smaller than the sum of its proper divisors (2194908578272).

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

1856930121728 is a wasteful number, since it uses less digits than its factorization.

1856930121728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27381 (or 27361 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 53.

The spelling of 1856930121728 in words is "one trillion, eight hundred fifty-six billion, nine hundred thirty million, one hundred twenty-one thousand, seven hundred twenty-eight".