12440404215 has 48 divisors (see below), whose sum is σ = 21724990560. Its totient is φ = 6585304320.

The previous prime is 12440404201. The next prime is 12440404237. The reversal of 12440404215 is 51240404421.

12440404215 is a `hidden beast` number, since 1 + 2 + 4 + 40 + 404 + 215 = 666.

It is not a de Polignac number, because 12440404215 - 2⁵ = 12440404183 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5317516 + ... + 5319854.

It is an arithmetic number, because the mean of its divisors is an integer number (452603970).

Almost surely, 2^12440404215 is an apocalyptic number.

12440404215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12440404215 is a deficient number, since it is larger than the sum of its proper divisors (9284586345).

12440404215 is a wasteful number, since it uses less digits than its factorization.

12440404215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3184 (or 3181 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

Adding to 12440404215 its reverse (51240404421), we get a palindrome (63680808636).

The spelling of 12440404215 in words is "twelve billion, four hundred forty million, four hundred four thousand, two hundred fifteen".