263646450354513 has 16 divisors (see below), whose sum is σ = 370032610144320. Its totient is φ = 166512420619776.

The previous prime is 263646450354509. The next prime is 263646450354541. The reversal of 263646450354513 is 315453054646362.

It is a happy number.

It is not a de Polignac number, because 263646450354513 - 2² = 263646450354509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (263646450354583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7116120 + ... + 24040217.

It is an arithmetic number, because the mean of its divisors is an integer number (23127038134020).

Almost surely, 2^{263646450354513} is an apocalyptic number.

It is an amenable number.

263646450354513 is a deficient number, since it is larger than the sum of its proper divisors (106386159789807).

263646450354513 is a wasteful number, since it uses less digits than its factorization.

263646450354513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31304816.

The product of its (nonzero) digits is 93312000, while the sum is 57.

The spelling of 263646450354513 in words is "two hundred sixty-three trillion, six hundred forty-six billion, four hundred fifty million, three hundred fifty-four thousand, five hundred thirteen".