263240273346645 has 64 divisors (see below), whose sum is σ = 493146399043584. Its totient is φ = 117397022561280.

The previous prime is 263240273346607. The next prime is 263240273346667. The reversal of 263240273346645 is 546643372042362.

It is not a de Polignac number, because 263240273346645 - 2⁷ = 263240273346517 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 31705476 + ... + 39137165.

It is an arithmetic number, because the mean of its divisors is an integer number (7705412485056).

Almost surely, 2^{263240273346645} is an apocalyptic number.

It is an amenable number.

263240273346645 is a deficient number, since it is larger than the sum of its proper divisors (229906125696939).

263240273346645 is a wasteful number, since it uses less digits than its factorization.

263240273346645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70843522.

The product of its (nonzero) digits is 104509440, while the sum is 57.

The spelling of 263240273346645 in words is "two hundred sixty-three trillion, two hundred forty billion, two hundred seventy-three million, three hundred forty-six thousand, six hundred forty-five".