1994997331632 has 40 divisors (see below), whose sum is σ = 5154893281984. Its totient is φ = 664850700864.

The previous prime is 1994997331619. The next prime is 1994997331633. The reversal of 1994997331632 is 2361337994991.

It is not an unprimeable number, because it can be changed into a prime (1994997331633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4420378 + ... + 4850745.

Almost surely, 2^{1994997331632} is an apocalyptic number.

1994997331632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1994997331632 is an abundant number, since it is smaller than the sum of its proper divisors (3159895950352).

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

1994997331632 is a wasteful number, since it uses less digits than its factorization.

1994997331632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9275617 (or 9275611 counting only the distinct ones).

The product of its digits is 59521392, while the sum is 66.

The spelling of 1994997331632 in words is "one trillion, nine hundred ninety-four billion, nine hundred ninety-seven million, three hundred thirty-one thousand, six hundred thirty-two".