1986859869632 has 56 divisors (see below), whose sum is σ = 4325128824960. Its totient is φ = 898072712960.

The previous prime is 1986859869611. The next prime is 1986859869637. The reversal of 1986859869632 is 2369689586891.

It is a super-2 number, since 2×1986859869632² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1986859869637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7757348 + ... + 8009379.

Almost surely, 2^{1986859869632} is an apocalyptic number.

It is an amenable number.

1986859869632 is an abundant number, since it is smaller than the sum of its proper divisors (2338268955328).

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

1986859869632 is a wasteful number, since it uses less digits than its factorization.

1986859869632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15766929 (or 15766919 counting only the distinct ones).

The product of its digits is 2418647040, while the sum is 80.

The spelling of 1986859869632 in words is "one trillion, nine hundred eighty-six billion, eight hundred fifty-nine million, eight hundred sixty-nine thousand, six hundred thirty-two".