12861219738 has 32 divisors (see below), whose sum is σ = 27138888000. Its totient is φ = 4052042496.

The previous prime is 12861219697. The next prime is 12861219751. The reversal of 12861219738 is 83791216821.

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, 80913 + ... + 179636.

It is an arithmetic number, because the mean of its divisors is an integer number (848090250).

Almost surely, 2^12861219738 is an apocalyptic number.

12861219738 is an abundant number, since it is smaller than the sum of its proper divisors (14277668262).

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

12861219738 is a wasteful number, since it uses less digits than its factorization.

12861219738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261006.

The product of its digits is 290304, while the sum is 48.

The spelling of 12861219738 in words is "twelve billion, eight hundred sixty-one million, two hundred nineteen thousand, seven hundred thirty-eight".