1316051646221 has 8 divisors (see below), whose sum is σ = 1466158333080. Its totient is φ = 1172926665792.

The previous prime is 1316051646181. The next prime is 1316051646229. The reversal of 1316051646221 is 1226461506131.

It can be written as a sum of positive squares in 4 ways, for example, as 4305196996 + 1311746449225 = 65614^2 + 1145315^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1316051646221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1316051646229) 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, 1745426210 + ... + 1745426963.

It is an arithmetic number, because the mean of its divisors is an integer number (183269791635).

Almost surely, 2^{1316051646221} is an apocalyptic number.

It is an amenable number.

1316051646221 is a deficient number, since it is larger than the sum of its proper divisors (150106686859).

1316051646221 is a wasteful number, since it uses less digits than its factorization.

1316051646221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3490853215.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 1316051646221 in words is "one trillion, three hundred sixteen billion, fifty-one million, six hundred forty-six thousand, two hundred twenty-one".