12781541215 has 16 divisors (see below), whose sum is σ = 15633101088. Its totient is φ = 10028543616.

The previous prime is 12781541207. The next prime is 12781541251. The reversal of 12781541215 is 51214518721.

It is a cyclic number.

It is not a de Polignac number, because 12781541215 - 2³ = 12781541207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 854632 + ... + 869458.

It is an arithmetic number, because the mean of its divisors is an integer number (977068818).

Almost surely, 2^12781541215 is an apocalyptic number.

12781541215 is a deficient number, since it is larger than the sum of its proper divisors (2851559873).

12781541215 is a wasteful number, since it uses less digits than its factorization.

12781541215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18138.

The product of its digits is 22400, while the sum is 37.

The spelling of 12781541215 in words is "twelve billion, seven hundred eighty-one million, five hundred forty-one thousand, two hundred fifteen".