12406561886 has 16 divisors (see below), whose sum is σ = 19739569104. Its totient is φ = 5828002944.

The previous prime is 12406561789. The next prime is 12406561931. The reversal of 12406561886 is 68816560421.

It is a super-2 number, since 2×12406561886² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12406561886.

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, 304925 + ... + 343208.

It is an arithmetic number, because the mean of its divisors is an integer number (1233723069).

Almost surely, 2^12406561886 is an apocalyptic number.

12406561886 is a deficient number, since it is larger than the sum of its proper divisors (7333007218).

12406561886 is a wasteful number, since it uses less digits than its factorization.

12406561886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648715.

The product of its (nonzero) digits is 552960, while the sum is 47.

The spelling of 12406561886 in words is "twelve billion, four hundred six million, five hundred sixty-one thousand, eight hundred eighty-six".