1849798636686 has 640 divisors, whose sum is σ = 5868186863616. Its totient is φ = 419769630720.

The previous prime is 1849798636627. The next prime is 1849798636711. The reversal of 1849798636686 is 6866368979481.

1849798636686 is a `hidden beast` number, since 1 + 8 + 4 + 97 + 98 + 6 + 366 + 86 = 666.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 361780866 + ... + 361785978.

Almost surely, 2^{1849798636686} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1849798636686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2934093431808).

1849798636686 is an abundant number, since it is smaller than the sum of its proper divisors (4018388226930).

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

1849798636686 is a wasteful number, since it uses less digits than its factorization.

1849798636686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5278 (or 5269 counting only the distinct ones).

The product of its digits is 4514807808, while the sum is 81.

The spelling of 1849798636686 in words is "one trillion, eight hundred forty-nine billion, seven hundred ninety-eight million, six hundred thirty-six thousand, six hundred eighty-six".