1043866128745 has 8 divisors (see below), whose sum is σ = 1366515659520. Its totient is φ = 759175366320.

The previous prime is 1043866128743. The next prime is 1043866128749. The reversal of 1043866128745 is 5478216683401.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1043866128745 - 2¹ = 1043866128743 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55), and also a Moran number because the ratio is a prime number: 18979384159 = 1043866128745 / (1 + 0 + 4 + 3 + 8 + 6 + 6 + 1 + 2 + 8 + 7 + 4 + 5).

It is not an unprimeable number, because it can be changed into a prime (1043866128743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9489692025 + ... + 9489692134.

It is an arithmetic number, because the mean of its divisors is an integer number (170814457440).

Almost surely, 2^{1043866128745} is an apocalyptic number.

It is an amenable number.

1043866128745 is a deficient number, since it is larger than the sum of its proper divisors (322649530775).

1043866128745 is a wasteful number, since it uses less digits than its factorization.

1043866128745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18979384175.

The product of its (nonzero) digits is 7741440, while the sum is 55.

The spelling of 1043866128745 in words is "one trillion, forty-three billion, eight hundred sixty-six million, one hundred twenty-eight thousand, seven hundred forty-five".