12400171615445 has 8 divisors (see below), whose sum is σ = 14880300148440. Its totient is φ = 9920074485760.

The previous prime is 12400171615417. The next prime is 12400171615451. The reversal of 12400171615445 is 54451617100421.

It can be written as a sum of positive squares in 4 ways, for example, as 5778283285636 + 6621888329809 = 2403806^2 + 2573303^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12400171615445 - 2¹⁸ = 12400171353301 is a prime.

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, 6973196 + ... + 8568885.

It is an arithmetic number, because the mean of its divisors is an integer number (1860037518555).

Almost surely, 2^{12400171615445} is an apocalyptic number.

It is an amenable number.

12400171615445 is a deficient number, since it is larger than the sum of its proper divisors (2480128532995).

12400171615445 is a wasteful number, since it uses less digits than its factorization.

12400171615445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15701655.

The product of its (nonzero) digits is 134400, while the sum is 41.

Adding to 12400171615445 its reverse (54451617100421), we get a palindrome (66851788715866).

The spelling of 12400171615445 in words is "twelve trillion, four hundred billion, one hundred seventy-one million, six hundred fifteen thousand, four hundred forty-five".