1990746389632 has 512 divisors, whose sum is σ = 5554410946560. Its totient is φ = 685581926400.

The previous prime is 1990746389603. The next prime is 1990746389647. The reversal of 1990746389632 is 2369836470991.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 385278313 + ... + 385283479.

It is an arithmetic number, because the mean of its divisors is an integer number (10848458880).

Almost surely, 2^{1990746389632} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1990746389632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2777205473280).

1990746389632 is an abundant number, since it is smaller than the sum of its proper divisors (3563664556928).

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

1990746389632 is a wasteful number, since it uses less digits than its factorization.

1990746389632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5340 (or 5328 counting only the distinct ones).

The product of its (nonzero) digits is 105815808, while the sum is 67.

The spelling of 1990746389632 in words is "one trillion, nine hundred ninety billion, seven hundred forty-six million, three hundred eighty-nine thousand, six hundred thirty-two".