12386015540 has 24 divisors (see below), whose sum is σ = 26645040072. Its totient is φ = 4833566720.

The previous prime is 12386015531. The next prime is 12386015557. The reversal of 12386015540 is 4551068321.

It can be written as a sum of positive squares in 4 ways, for example, as 106276 + 12385909264 = 326^2 + 111292^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12386015540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7551629 + ... + 7553268.

It is an arithmetic number, because the mean of its divisors is an integer number (1110210003).

Almost surely, 2^12386015540 is an apocalyptic number.

12386015540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12386015540 is an abundant number, since it is smaller than the sum of its proper divisors (14259024532).

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

12386015540 is a wasteful number, since it uses less digits than its factorization.

12386015540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15104947 (or 15104945 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The spelling of 12386015540 in words is "twelve billion, three hundred eighty-six million, fifteen thousand, five hundred forty".