12464551720 has 16 divisors (see below), whose sum is σ = 28045241460. Its totient is φ = 4985820672.

The previous prime is 12464551711. The next prime is 12464551721. The reversal of 12464551720 is 2715546421.

It can be written as a sum of positive squares in 2 ways, for example, as 11333305764 + 1131245956 = 106458^2 + 33634^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12464551720.

It is not an unprimeable number, because it can be changed into a prime (12464551721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155806857 + ... + 155806936.

Almost surely, 2^12464551720 is an apocalyptic number.

12464551720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12464551720 is an abundant number, since it is smaller than the sum of its proper divisors (15580689740).

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

12464551720 is a wasteful number, since it uses less digits than its factorization.

12464551720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311613804 (or 311613800 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 37.

The spelling of 12464551720 in words is "twelve billion, four hundred sixty-four million, five hundred fifty-one thousand, seven hundred twenty".