12787439551218 has 12 divisors (see below), whose sum is σ = 27706119027678. Its totient is φ = 4262479850400.

The previous prime is 12787439551217. The next prime is 12787439551253. The reversal of 12787439551218 is 81215593478721.

12787439551218 is a `hidden beast` number, since 1 + 2 + 7 + 8 + 74 + 3 + 9 + 551 + 2 + 1 + 8 = 666.

12787439551218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 11407418435169 + 1380021116049 = 3377487^2 + 1174743^2 .

It is a super-2 number, since 2×12787439551218² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12787439551217) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 355206654183 + ... + 355206654218.

Almost surely, 2^{12787439551218} is an apocalyptic number.

12787439551218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12787439551218 is an abundant number, since it is smaller than the sum of its proper divisors (14918679476460).

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

12787439551218 is a wasteful number, since it uses less digits than its factorization.

12787439551218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710413308409 (or 710413308406 counting only the distinct ones).

The product of its digits is 33868800, while the sum is 63.

The spelling of 12787439551218 in words is "twelve trillion, seven hundred eighty-seven billion, four hundred thirty-nine million, five hundred fifty-one thousand, two hundred eighteen".