1243467075728 has 20 divisors (see below), whose sum is σ = 2412504272508. Its totient is φ = 620885328000.

The previous prime is 1243467075727. The next prime is 1243467075797. The reversal of 1243467075728 is 8275707643421.

It can be written as a sum of positive squares in 2 ways, for example, as 1147238072464 + 96229003264 = 1071092^2 + 310208^2 .

It is not an unprimeable number, because it can be changed into a prime (1243467075727) 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, 53001023 + ... + 53024478.

Almost surely, 2^{1243467075728} is an apocalyptic number.

It is an amenable number.

1243467075728 is a deficient number, since it is larger than the sum of its proper divisors (1169037196780).

1243467075728 is a wasteful number, since it uses less digits than its factorization.

1243467075728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106026242 (or 106026236 counting only the distinct ones).

The product of its (nonzero) digits is 15805440, while the sum is 56.

The spelling of 1243467075728 in words is "one trillion, two hundred forty-three billion, four hundred sixty-seven million, seventy-five thousand, seven hundred twenty-eight".