263661145404135 has 32 divisors (see below), whose sum is σ = 422757814068480. Its totient is φ = 140319600715008.

The previous prime is 263661145404103. The next prime is 263661145404149. The reversal of 263661145404135 is 531404541166362.

It is not a de Polignac number, because 263661145404135 - 2⁵ = 263661145404103 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3405732 + ... + 23214678.

It is an arithmetic number, because the mean of its divisors is an integer number (13211181689640).

Almost surely, 2^{263661145404135} is an apocalyptic number.

263661145404135 is a deficient number, since it is larger than the sum of its proper divisors (159096668664345).

263661145404135 is a wasteful number, since it uses less digits than its factorization.

263661145404135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19810847.

The product of its (nonzero) digits is 6220800, while the sum is 51.

The spelling of 263661145404135 in words is "two hundred sixty-three trillion, six hundred sixty-one billion, one hundred forty-five million, four hundred four thousand, one hundred thirty-five".