1605265271345 has 32 divisors (see below), whose sum is σ = 1975939488000. Its totient is φ = 1251554616576.

The previous prime is 1605265271303. The next prime is 1605265271353. The reversal of 1605265271345 is 5431725625061.

It is a cyclic number.

It is not a de Polignac number, because 1605265271345 - 2⁸ = 1605265271089 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1605265271345.

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 31 ways as a sum of consecutive naturals, for example, 16211927 + ... + 16310643.

It is an arithmetic number, because the mean of its divisors is an integer number (61748109000).

Almost surely, 2^{1605265271345} is an apocalyptic number.

It is an amenable number.

1605265271345 is a deficient number, since it is larger than the sum of its proper divisors (370674216655).

1605265271345 is a wasteful number, since it uses less digits than its factorization.

1605265271345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99257.

The product of its (nonzero) digits is 1512000, while the sum is 47.

The spelling of 1605265271345 in words is "one trillion, six hundred five billion, two hundred sixty-five million, two hundred seventy-one thousand, three hundred forty-five".