12215377531616 has 24 divisors (see below), whose sum is σ = 27484599446640. Its totient is φ = 5235161799168.

The previous prime is 12215377531573. The next prime is 12215377531627. The reversal of 12215377531616 is 61613577351221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27266467481 + ... + 27266467928.

It is an arithmetic number, because the mean of its divisors is an integer number (1145191643610).

Almost surely, 2^{12215377531616} is an apocalyptic number.

12215377531616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12215377531616 is an abundant number, since it is smaller than the sum of its proper divisors (15269221915024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12215377531616 is an equidigital number, since it uses as much as digits as its factorization.

12215377531616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54532935426 (or 54532935418 counting only the distinct ones).

The product of its digits is 1587600, while the sum is 50.

The spelling of 12215377531616 in words is "twelve trillion, two hundred fifteen billion, three hundred seventy-seven million, five hundred thirty-one thousand, six hundred sixteen".