1005123440155 has 8 divisors (see below), whose sum is σ = 1206154254384. Its totient is φ = 804094668000.

The previous prime is 1005123440143. The next prime is 1005123440173. The reversal of 1005123440155 is 5510443215001.

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

It is not a de Polignac number, because 1005123440155 - 2⁹ = 1005123439643 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 954580 + ... + 1709230.

It is an arithmetic number, because the mean of its divisors is an integer number (150769281798).

Almost surely, 2^{1005123440155} is an apocalyptic number.

1005123440155 is a deficient number, since it is larger than the sum of its proper divisors (201030814229).

1005123440155 is an equidigital number, since it uses as much as digits as its factorization.

1005123440155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021037.

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 1005123440155 its reverse (5510443215001), we get a palindrome (6515566655156).

The spelling of 1005123440155 in words is "one trillion, five billion, one hundred twenty-three million, four hundred forty thousand, one hundred fifty-five".