263516304650161 has 4 divisors (see below), whose sum is σ = 267449383824112. Its totient is φ = 259583225476212.

The previous prime is 263516304650153. The next prime is 263516304650197. The reversal of 263516304650161 is 161056403615362.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 263516304650161 - 2³ = 263516304650153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263516304650101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1966539586875 + ... + 1966539587008.

It is an arithmetic number, because the mean of its divisors is an integer number (66862345956028).

Almost surely, 2^{263516304650161} is an apocalyptic number.

It is an amenable number.

263516304650161 is a deficient number, since it is larger than the sum of its proper divisors (3933079173951).

263516304650161 is an equidigital number, since it uses as much as digits as its factorization.

263516304650161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3933079173950.

The product of its (nonzero) digits is 2332800, while the sum is 49.

The spelling of 263516304650161 in words is "two hundred sixty-three trillion, five hundred sixteen billion, three hundred four million, six hundred fifty thousand, one hundred sixty-one".