1988923297536 has 432 divisors, whose sum is σ = 6786414398400. Its totient is φ = 548131110912.

The previous prime is 1988923297483. The next prime is 1988923297549. The reversal of 1988923297536 is 6357923298891.

1988923297536 is a `hidden beast` number, since 1 + 9 + 8 + 89 + 2 + 3 + 2 + 9 + 7 + 536 = 666.

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, 836735580 + ... + 836737956.

Almost surely, 2^{1988923297536} is an apocalyptic number.

1988923297536 is a gapful number since it is divisible by the number (16) 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 1988923297536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3393207199200).

1988923297536 is an abundant number, since it is smaller than the sum of its proper divisors (4797491100864).

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

1988923297536 is a wasteful number, since it uses less digits than its factorization.

1988923297536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4224 (or 4207 counting only the distinct ones).

The product of its digits is 352719360, while the sum is 72.

The spelling of 1988923297536 in words is "one trillion, nine hundred eighty-eight billion, nine hundred twenty-three million, two hundred ninety-seven thousand, five hundred thirty-six".