12777730536 has 128 divisors (see below), whose sum is σ = 35508326400. Its totient is φ = 3813411840.

The previous prime is 12777730531. The next prime is 12777730547. The reversal of 12777730536 is 63503777721.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12777730531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 737671 + ... + 754793.

It is an arithmetic number, because the mean of its divisors is an integer number (277408800).

Almost surely, 2^12777730536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12777730536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17754163200).

12777730536 is an abundant number, since it is smaller than the sum of its proper divisors (22730595864).

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

12777730536 is a wasteful number, since it uses less digits than its factorization.

12777730536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17239 (or 17235 counting only the distinct ones).

The product of its (nonzero) digits is 1296540, while the sum is 48.

The spelling of 12777730536 in words is "twelve billion, seven hundred seventy-seven million, seven hundred thirty thousand, five hundred thirty-six".