1263983935249 has 4 divisors (see below), whose sum is σ = 1444553068864. Its totient is φ = 1083414801636.

The previous prime is 1263983935241. The next prime is 1263983935307. The reversal of 1263983935249 is 9425393893621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1263983935249 - 2³ = 1263983935241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1263983935241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90284566797 + ... + 90284566810.

It is an arithmetic number, because the mean of its divisors is an integer number (361138267216).

Almost surely, 2^{1263983935249} is an apocalyptic number.

It is an amenable number.

1263983935249 is a deficient number, since it is larger than the sum of its proper divisors (180569133615).

1263983935249 is an equidigital number, since it uses as much as digits as its factorization.

1263983935249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180569133614.

The product of its digits is 75582720, while the sum is 64.

The spelling of 1263983935249 in words is "one trillion, two hundred sixty-three billion, nine hundred eighty-three million, nine hundred thirty-five thousand, two hundred forty-nine".