1138643240459 has 4 divisors (see below), whose sum is σ = 1140747942000. Its totient is φ = 1136538538920.

The previous prime is 1138643240453. The next prime is 1138643240521. The reversal of 1138643240459 is 9540423468311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1138643240459 - 2⁴ = 1138643240443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1138643240453) 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, 1052349959 + ... + 1052351040.

It is an arithmetic number, because the mean of its divisors is an integer number (285186985500).

Almost surely, 2^{1138643240459} is an apocalyptic number.

1138643240459 is a deficient number, since it is larger than the sum of its proper divisors (2104701541).

1138643240459 is an equidigital number, since it uses as much as digits as its factorization.

1138643240459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2104701540.

The product of its (nonzero) digits is 2488320, while the sum is 50.

The spelling of 1138643240459 in words is "one trillion, one hundred thirty-eight billion, six hundred forty-three million, two hundred forty thousand, four hundred fifty-nine".