12087699136 has 56 divisors (see below), whose sum is σ = 24538692096. Its totient is φ = 5905163520.

The previous prime is 12087699101. The next prime is 12087699137. The reversal of 12087699136 is 63199678021.

It is a happy number.

It is a super-2 number, since 2×12087699136² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12087699137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1943071 + ... + 1949281.

Almost surely, 2^12087699136 is an apocalyptic number.

12087699136 is a gapful number since it is divisible by the number (16) 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 12087699136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12269346048).

12087699136 is an abundant number, since it is smaller than the sum of its proper divisors (12450992960).

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

12087699136 is an equidigital number, since it uses as much as digits as its factorization.

12087699136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6917 (or 6907 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 52.

The spelling of 12087699136 in words is "twelve billion, eighty-seven million, six hundred ninety-nine thousand, one hundred thirty-six".