1316563261226 has 4 divisors (see below), whose sum is σ = 1974844891842. Its totient is φ = 658281630612.

The previous prime is 1316563261213. The next prime is 1316563261271. The reversal of 1316563261226 is 6221623656131.

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

It can be written as a sum of positive squares in only one way, i.e., 894906540025 + 421656721201 = 945995^2 + 649351^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329140815305 + ... + 329140815308.

Almost surely, 2^{1316563261226} is an apocalyptic number.

1316563261226 is a deficient number, since it is larger than the sum of its proper divisors (658281630616).

1316563261226 is an equidigital number, since it uses as much as digits as its factorization.

1316563261226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658281630615.

The product of its digits is 466560, while the sum is 44.

The spelling of 1316563261226 in words is "one trillion, three hundred sixteen billion, five hundred sixty-three million, two hundred sixty-one thousand, two hundred twenty-six".