263136173230643 has 16 divisors (see below), whose sum is σ = 291729489995520. Its totient is φ = 236219850842976.

The previous prime is 263136173230639. The next prime is 263136173230727. The reversal of 263136173230643 is 346032371631362.

It is a cyclic number.

It is not a de Polignac number, because 263136173230643 - 2² = 263136173230639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 263136173230591 and 263136173230600.

It is not an unprimeable number, because it can be changed into a prime (263136173230543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2813702180 + ... + 2813795697.

It is an arithmetic number, because the mean of its divisors is an integer number (18233093124720).

Almost surely, 2^{263136173230643} is an apocalyptic number.

263136173230643 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

263136173230643 is a deficient number, since it is larger than the sum of its proper divisors (28593316764877).

263136173230643 is a wasteful number, since it uses less digits than its factorization.

263136173230643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5627498026.

The product of its (nonzero) digits is 5878656, while the sum is 50.

The spelling of 263136173230643 in words is "two hundred sixty-three trillion, one hundred thirty-six billion, one hundred seventy-three million, two hundred thirty thousand, six hundred forty-three".