1605265271263 has 8 divisors (see below), whose sum is σ = 1621240524800. Its totient is φ = 1589297520888.

The previous prime is 1605265271231. The next prime is 1605265271273. The reversal of 1605265271263 is 3621725625061.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1605265271263 - 2⁵ = 1605265271231 is a prime.

It is a super-2 number, since 2×1605265271263² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1605265271273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1445283 + ... + 2302036.

It is an arithmetic number, because the mean of its divisors is an integer number (202655065600).

Almost surely, 2^{1605265271263} is an apocalyptic number.

1605265271263 is a deficient number, since it is larger than the sum of its proper divisors (15975253537).

1605265271263 is a wasteful number, since it uses less digits than its factorization.

1605265271263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3751581.

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 1605265271263 in words is "one trillion, six hundred five billion, two hundred sixty-five million, two hundred seventy-one thousand, two hundred sixty-three".