1856378036196 has 36 divisors (see below), whose sum is σ = 4692564965452. Its totient is φ = 618785581824.

The previous prime is 1856378036159. The next prime is 1856378036231. The reversal of 1856378036196 is 6916308736581.

1856378036196 is a `hidden beast` number, since 1 + 8 + 5 + 6 + 3 + 7 + 8 + 0 + 3 + 619 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 368465996196 + 1487912040000 = 607014^2 + 1219800^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1856378036196² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3584136 + ... + 4069248.

Almost surely, 2^{1856378036196} is an apocalyptic number.

It is an amenable number.

1856378036196 is an abundant number, since it is smaller than the sum of its proper divisors (2836186929256).

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

1856378036196 is a wasteful number, since it uses less digits than its factorization.

1856378036196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591420 (or 591415 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 63.

The spelling of 1856378036196 in words is "one trillion, eight hundred fifty-six billion, three hundred seventy-eight million, thirty-six thousand, one hundred ninety-six".