1990694567736 has 192 divisors, whose sum is σ = 6271686532800. Its totient is φ = 558641664000.

The previous prime is 1990694567711. The next prime is 1990694567737. The reversal of 1990694567736 is 6377654960991.

1990694567736 is a `hidden beast` number, since 19 + 9 + 0 + 69 + 456 + 77 + 36 = 666.

It is a super-3 number, since 3×1990694567736³ (a number of 38 digits) contains 333 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990694567737) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21505360 + ... + 21597728.

It is an arithmetic number, because the mean of its divisors is an integer number (32665034025).

Almost surely, 2^{1990694567736} 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 1990694567736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3135843266400).

1990694567736 is an abundant number, since it is smaller than the sum of its proper divisors (4280991965064).

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

1990694567736 is a wasteful number, since it uses less digits than its factorization.

1990694567736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93150 (or 93143 counting only the distinct ones).

The product of its (nonzero) digits is 462944160, while the sum is 72.

The spelling of 1990694567736 in words is "one trillion, nine hundred ninety billion, six hundred ninety-four million, five hundred sixty-seven thousand, seven hundred thirty-six".