1005163440187 has 4 divisors (see below), whose sum is σ = 1048866198480. Its totient is φ = 961460681896.

The previous prime is 1005163440137. The next prime is 1005163440217. The reversal of 1005163440187 is 7810443615001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1005163440187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1005163440137) 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, 21851379112 + ... + 21851379157.

It is an arithmetic number, because the mean of its divisors is an integer number (262216549620).

Almost surely, 2^{1005163440187} is an apocalyptic number.

1005163440187 is a deficient number, since it is larger than the sum of its proper divisors (43702758293).

1005163440187 is an equidigital number, since it uses as much as digits as its factorization.

1005163440187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43702758292.

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 1005163440187 in words is "one trillion, five billion, one hundred sixty-three million, four hundred forty thousand, one hundred eighty-seven".