12349215720 has 128 divisors (see below), whose sum is σ = 41188694400. Its totient is φ = 3291153408.

The previous prime is 12349215677. The next prime is 12349215733. The reversal of 12349215720 is 2751294321.

12349215720 is a `hidden beast` number, since 1 + 23 + 49 + 21 + 572 + 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 (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3126787 + ... + 3130733.

It is an arithmetic number, because the mean of its divisors is an integer number (321786675).

Almost surely, 2^12349215720 is an apocalyptic number.

12349215720 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 12349215720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20594347200).

12349215720 is an abundant number, since it is smaller than the sum of its proper divisors (28839478680).

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

12349215720 is a wasteful number, since it uses less digits than its factorization.

12349215720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6864 (or 6854 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The spelling of 12349215720 in words is "twelve billion, three hundred forty-nine million, two hundred fifteen thousand, seven hundred twenty".