1855850568864 has 192 divisors, whose sum is σ = 5194663778304. Its totient is φ = 578909776896.

The previous prime is 1855850568821. The next prime is 1855850568881. The reversal of 1855850568864 is 4688650585581.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18827034 + ... + 18925350.

It is an arithmetic number, because the mean of its divisors is an integer number (27055540512).

Almost surely, 2^{1855850568864} 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 1855850568864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2597331889152).

1855850568864 is an abundant number, since it is smaller than the sum of its proper divisors (3338813209440).

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

1855850568864 is a wasteful number, since it uses less digits than its factorization.

1855850568864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98539 (or 98531 counting only the distinct ones).

The product of its (nonzero) digits is 368640000, while the sum is 69.

The spelling of 1855850568864 in words is "one trillion, eight hundred fifty-five billion, eight hundred fifty million, five hundred sixty-eight thousand, eight hundred sixty-four".