1316051646181 has 2 divisors, whose sum is σ = 1316051646182. Its totient is φ = 1316051646180.

The previous prime is 1316051646137. The next prime is 1316051646229. The reversal of 1316051646181 is 1816461506131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1077672372100 + 238379274081 = 1038110^2 + 488241^2 .

It is a cyclic number.

It is not a de Polignac number, because 1316051646181 - 2²⁷ = 1315917428453 is a prime.

It is a super-2 number, since 2×1316051646181² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1316051646881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658025823090 + 658025823091.

It is an arithmetic number, because the mean of its divisors is an integer number (658025823091).

Almost surely, 2^{1316051646181} is an apocalyptic number.

It is an amenable number.

1316051646181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1316051646181 is an equidigital number, since it uses as much as digits as its factorization.

1316051646181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 43.

The spelling of 1316051646181 in words is "one trillion, three hundred sixteen billion, fifty-one million, six hundred forty-six thousand, one hundred eighty-one".