1263322326538 has 8 divisors (see below), whose sum is σ = 1909904620032. Its totient is φ = 626687453196.

The previous prime is 1263322326521. The next prime is 1263322326551. The reversal of 1263322326538 is 8356232233621.

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

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 in 3 ways as a sum of consecutive naturals, for example, 2486854720 + ... + 2486855227.

It is an arithmetic number, because the mean of its divisors is an integer number (238738077504).

Almost surely, 2^{1263322326538} is an apocalyptic number.

1263322326538 is a deficient number, since it is larger than the sum of its proper divisors (646582293494).

1263322326538 is a wasteful number, since it uses less digits than its factorization.

1263322326538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4973710076.

The product of its digits is 1866240, while the sum is 46.

The spelling of 1263322326538 in words is "one trillion, two hundred sixty-three billion, three hundred twenty-two million, three hundred twenty-six thousand, five hundred thirty-eight".