12547339776 has 640 divisors, whose sum is σ = 42740121600. Its totient is φ = 3613040640.

The previous prime is 12547339771. The next prime is 12547339793. The reversal of 12547339776 is 67793374521.

12547339776 is a `hidden beast` number, since 1 + 2 + 547 + 3 + 3 + 97 + 7 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12547339771) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 187273695 + ... + 187273761.

It is an arithmetic number, because the mean of its divisors is an integer number (66781440).

Almost surely, 2^12547339776 is an apocalyptic number.

12547339776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12547339776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21370060800).

12547339776 is an abundant number, since it is smaller than the sum of its proper divisors (30192781824).

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

12547339776 is a wasteful number, since it uses less digits than its factorization.

12547339776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167 (or 145 counting only the distinct ones).

The product of its digits is 6667920, while the sum is 54.

The spelling of 12547339776 in words is "twelve billion, five hundred forty-seven million, three hundred thirty-nine thousand, seven hundred seventy-six".