12787439551216 has 40 divisors (see below), whose sum is σ = 27081097614000. Its totient is φ = 5801053086720.

The previous prime is 12787439551123. The next prime is 12787439551217. The reversal of 12787439551216 is 61215593478721.

It is a happy number.

It is a super-2 number, since 2×12787439551216² (a number of 27 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 71281641 + ... + 71460808.

It is an arithmetic number, because the mean of its divisors is an integer number (677027440350).

Almost surely, 2^{12787439551216} is an apocalyptic number.

12787439551216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12787439551216 is an abundant number, since it is smaller than the sum of its proper divisors (14293658062784).

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

12787439551216 is a wasteful number, since it uses less digits than its factorization.

12787439551216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142742977 (or 142742971 counting only the distinct ones).

The product of its digits is 25401600, while the sum is 61.

The spelling of 12787439551216 in words is "twelve trillion, seven hundred eighty-seven billion, four hundred thirty-nine million, five hundred fifty-one thousand, two hundred sixteen".