12399561006 has 32 divisors (see below), whose sum is σ = 29833532160. Its totient is φ = 3356271936.

The previous prime is 12399560977. The next prime is 12399561029. The reversal of 12399561006 is 60016599321.

12399561006 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12399561006² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7768351 + ... + 7769946.

It is an arithmetic number, because the mean of its divisors is an integer number (932297880).

Almost surely, 2^12399561006 is an apocalyptic number.

12399561006 is an abundant number, since it is smaller than the sum of its proper divisors (17433971154).

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

12399561006 is a wasteful number, since it uses less digits than its factorization.

12399561006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15538328.

The product of its (nonzero) digits is 87480, while the sum is 42.

The spelling of 12399561006 in words is "twelve billion, three hundred ninety-nine million, five hundred sixty-one thousand, six".