12764216520 has 384 divisors, whose sum is σ = 48457543680. Its totient is φ = 2993760000.

The previous prime is 12764216483. The next prime is 12764216537. The reversal of 12764216520 is 2561246721.

It is a happy number.

12764216520 is a `hidden beast` number, since 1 + 2 + 7 + 642 + 1 + 6 + 5 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 3312595 + ... + 3316445.

It is an arithmetic number, because the mean of its divisors is an integer number (126191520).

Almost surely, 2^12764216520 is an apocalyptic number.

12764216520 is a gapful number since it is divisible by the number (10) 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 12764216520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24228771840).

12764216520 is an abundant number, since it is smaller than the sum of its proper divisors (35693327160).

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

12764216520 is a wasteful number, since it uses less digits than its factorization.

12764216520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3919 (or 3903 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The spelling of 12764216520 in words is "twelve billion, seven hundred sixty-four million, two hundred sixteen thousand, five hundred twenty".