11891677212 has 144 divisors (see below), whose sum is σ = 33130056960. Its totient is φ = 3579738624.

The previous prime is 11891677201. The next prime is 11891677243. The reversal of 11891677212 is 21277619811.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5300563 + ... + 5302805.

It is an arithmetic number, because the mean of its divisors is an integer number (230069840).

Almost surely, 2^11891677212 is an apocalyptic number.

11891677212 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 11891677212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16565028480).

11891677212 is an abundant number, since it is smaller than the sum of its proper divisors (21238379748).

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

11891677212 is a wasteful number, since it uses less digits than its factorization.

11891677212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2632 (or 2627 counting only the distinct ones).

The product of its digits is 84672, while the sum is 45.

The spelling of 11891677212 in words is "eleven billion, eight hundred ninety-one million, six hundred seventy-seven thousand, two hundred twelve".