1005255510145 has 4 divisors (see below), whose sum is σ = 1206306612180. Its totient is φ = 804204408112.

The previous prime is 1005255510121. The next prime is 1005255510163. The reversal of 1005255510145 is 5410155525001.

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

It can be written as a sum of positive squares in 2 ways, for example, as 225370471824 + 779885038321 = 474732^2 + 883111^2 .

It is a cyclic number.

It is not a de Polignac number, because 1005255510145 - 2⁹ = 1005255509633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1005255510145.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100525551010 + ... + 100525551019.

It is an arithmetic number, because the mean of its divisors is an integer number (301576653045).

Almost surely, 2^{1005255510145} is an apocalyptic number.

It is an amenable number.

1005255510145 is a deficient number, since it is larger than the sum of its proper divisors (201051102035).

1005255510145 is an equidigital number, since it uses as much as digits as its factorization.

1005255510145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201051102034.

The product of its (nonzero) digits is 25000, while the sum is 34.

The spelling of 1005255510145 in words is "one trillion, five billion, two hundred fifty-five million, five hundred ten thousand, one hundred forty-five".