1263842213505 has 8 divisors (see below), whose sum is σ = 2022147541632. Its totient is φ = 674049180528.

The previous prime is 1263842213497. The next prime is 1263842213509. The reversal of 1263842213505 is 5053122483621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1263842213505 - 2³ = 1263842213497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1263842213509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42128073769 + ... + 42128073798.

It is an arithmetic number, because the mean of its divisors is an integer number (252768442704).

Almost surely, 2^{1263842213505} is an apocalyptic number.

1263842213505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1263842213505 is a deficient number, since it is larger than the sum of its proper divisors (758305328127).

1263842213505 is an equidigital number, since it uses as much as digits as its factorization.

1263842213505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84256147575.

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 1263842213505 in words is "one trillion, two hundred sixty-three billion, eight hundred forty-two million, two hundred thirteen thousand, five hundred five".