13224640064 has 28 divisors (see below), whose sum is σ = 26286974604. Its totient is φ = 6601150464.

The previous prime is 13224640063. The next prime is 13224640097. The reversal of 13224640064 is 46004642231.

It can be written as a sum of positive squares in 2 ways, for example, as 3226240000 + 9998400064 = 56800^2 + 99992^2 .

It is a super-2 number, since 2×13224640064² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 13224640064.

It is not an unprimeable number, because it can be changed into a prime (13224640063) 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, 136277 + ... + 212180.

Almost surely, 2^13224640064 is an apocalyptic number.

It is an amenable number.

13224640064 is a deficient number, since it is larger than the sum of its proper divisors (13062334540).

13224640064 is an equidigital number, since it uses as much as digits as its factorization.

13224640064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349062 (or 349052 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The spelling of 13224640064 in words is "thirteen billion, two hundred twenty-four million, six hundred forty thousand, sixty-four".