12400406162516 has 24 divisors (see below), whose sum is σ = 21845874329664. Its totient is φ = 6158733235200.

The previous prime is 12400406162491. The next prime is 12400406162567. The reversal of 12400406162516 is 61526160400421.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12400406162516.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8526851 + ... + 9874613.

It is an arithmetic number, because the mean of its divisors is an integer number (910244763736).

Almost surely, 2^{12400406162516} is an apocalyptic number.

It is an amenable number.

12400406162516 is a deficient number, since it is larger than the sum of its proper divisors (9445468167148).

12400406162516 is a wasteful number, since it uses less digits than its factorization.

12400406162516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363151 (or 1363149 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

Adding to 12400406162516 its reverse (61526160400421), we get a palindrome (73926566562937).

The spelling of 12400406162516 in words is "twelve trillion, four hundred billion, four hundred six million, one hundred sixty-two thousand, five hundred sixteen".