11890996992 has 648 divisors, whose sum is σ = 42748183296. Its totient is φ = 3285080064.

The previous prime is 11890996969. The next prime is 11890997003. The reversal of 11890996992 is 29969909811.

It is a tau number, because it is divible by the number of its divisors (648).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 143264983 + ... + 143265065.

Almost surely, 2^11890996992 is an apocalyptic number.

11890996992 is a gapful number since it is divisible by the number (12) 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 11890996992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21374091648).

11890996992 is an abundant number, since it is smaller than the sum of its proper divisors (30857186304).

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

11890996992 is an frugal number, since it uses more digits than its factorization.

11890996992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 5668704, while the sum is 63.

The spelling of 11890996992 in words is "eleven billion, eight hundred ninety million, nine hundred ninety-six thousand, nine hundred ninety-two".