1263983935205 has 4 divisors (see below), whose sum is σ = 1516780722252. Its totient is φ = 1011187148160.

The previous prime is 1263983935189. The next prime is 1263983935237. The reversal of 1263983935205 is 5025393893621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 146865999361 + 1117117935844 = 383231^2 + 1056938^2 .

It is not a de Polignac number, because 1263983935205 - 2⁴ = 1263983935189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126398393516 + ... + 126398393525.

It is an arithmetic number, because the mean of its divisors is an integer number (379195180563).

Almost surely, 2^{1263983935205} is an apocalyptic number.

It is an amenable number.

1263983935205 is a deficient number, since it is larger than the sum of its proper divisors (252796787047).

1263983935205 is an equidigital number, since it uses as much as digits as its factorization.

1263983935205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252796787046.

The product of its (nonzero) digits is 10497600, while the sum is 56.

The spelling of 1263983935205 in words is "one trillion, two hundred sixty-three billion, nine hundred eighty-three million, nine hundred thirty-five thousand, two hundred five".