1986396787008 has 336 divisors, whose sum is σ = 6294934279296. Its totient is φ = 595685376000.

The previous prime is 1986396786953. The next prime is 1986396787073. The reversal of 1986396787008 is 8007876936891.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 611009383 + ... + 611012633.

Almost surely, 2^{1986396787008} is an apocalyptic number.

1986396787008 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1986396787008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3147467139648).

1986396787008 is an abundant number, since it is smaller than the sum of its proper divisors (4308537492288).

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

1986396787008 is a wasteful number, since it uses less digits than its factorization.

1986396787008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6022 (or 6009 counting only the distinct ones).

The product of its (nonzero) digits is 219469824, while the sum is 72.

The spelling of 1986396787008 in words is "one trillion, nine hundred eighty-six billion, three hundred ninety-six million, seven hundred eighty-seven thousand, eight".