12215443550415 has 24 divisors (see below), whose sum is σ = 22735682691120. Its totient is φ = 5584202765568.

The previous prime is 12215443550393. The next prime is 12215443550449. The reversal of 12215443550415 is 51405534451221.

It is not a de Polignac number, because 12215443550415 - 2¹⁴ = 12215443534031 is a prime.

It is a super-2 number, since 2×12215443550415² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8309824810 + ... + 8309826279.

It is an arithmetic number, because the mean of its divisors is an integer number (947320112130).

Almost surely, 2^{12215443550415} is an apocalyptic number.

12215443550415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12215443550415 is a deficient number, since it is larger than the sum of its proper divisors (10520239140705).

12215443550415 is a wasteful number, since it uses less digits than its factorization.

12215443550415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16619651111 (or 16619651104 counting only the distinct ones).

The product of its (nonzero) digits is 480000, while the sum is 42.

The spelling of 12215443550415 in words is "twelve trillion, two hundred fifteen billion, four hundred forty-three million, five hundred fifty thousand, four hundred fifteen".