12187387085 has 16 divisors (see below), whose sum is σ = 15285711744. Its totient is φ = 9310732992.

The previous prime is 12187387081. The next prime is 12187387129. The reversal of 12187387085 is 58078378121.

It is a cyclic number.

It is not a de Polignac number, because 12187387085 - 2² = 12187387081 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12187387081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15947 + ... + 156936.

It is an arithmetic number, because the mean of its divisors is an integer number (955356984).

Almost surely, 2^12187387085 is an apocalyptic number.

It is an amenable number.

12187387085 is a deficient number, since it is larger than the sum of its proper divisors (3098324659).

12187387085 is a wasteful number, since it uses less digits than its factorization.

12187387085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173524.

The product of its (nonzero) digits is 752640, while the sum is 50.

The spelling of 12187387085 in words is "twelve billion, one hundred eighty-seven million, three hundred eighty-seven thousand, eighty-five".