11891929896 has 512 divisors, whose sum is σ = 44068147200. Its totient is φ = 2876497920.

The previous prime is 11891929891. The next prime is 11891929939. The reversal of 11891929896 is 69892919811.

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

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (11891929891) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 38735775 + ... + 38736081.

It is an arithmetic number, because the mean of its divisors is an integer number (86070600).

Almost surely, 2^11891929896 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 11891929896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22034073600).

11891929896 is an abundant number, since it is smaller than the sum of its proper divisors (32176217304).

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

11891929896 is a wasteful number, since it uses less digits than its factorization.

11891929896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494 (or 484 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 63.

The spelling of 11891929896 in words is "eleven billion, eight hundred ninety-one million, nine hundred twenty-nine thousand, eight hundred ninety-six".