12188440487 has 8 divisors (see below), whose sum is σ = 12449846016. Its totient is φ = 11927121592.

The previous prime is 12188440457. The next prime is 12188440553. The reversal of 12188440487 is 78404488121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12188440487 - 2¹⁴ = 12188424103 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12188440417) 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, 319748 + ... + 355830.

It is an arithmetic number, because the mean of its divisors is an integer number (1556230752).

Almost surely, 2^12188440487 is an apocalyptic number.

12188440487 is a deficient number, since it is larger than the sum of its proper divisors (261405529).

12188440487 is an equidigital number, since it uses as much as digits as its factorization.

12188440487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43317.

The product of its (nonzero) digits is 458752, while the sum is 47.

The spelling of 12188440487 in words is "twelve billion, one hundred eighty-eight million, four hundred forty thousand, four hundred eighty-seven".