1311050561461 has 2 divisors, whose sum is σ = 1311050561462. Its totient is φ = 1311050561460.

The previous prime is 1311050561419. The next prime is 1311050561497. The reversal of 1311050561461 is 1641650501131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 915370562500 + 395679998961 = 956750^2 + 629031^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311050561461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311050561411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655525280730 + 655525280731.

It is an arithmetic number, because the mean of its divisors is an integer number (655525280731).

Almost surely, 2^{1311050561461} is an apocalyptic number.

It is an amenable number.

1311050561461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311050561461 is an equidigital number, since it uses as much as digits as its factorization.

1311050561461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 34.

The spelling of 1311050561461 in words is "one trillion, three hundred eleven billion, fifty million, five hundred sixty-one thousand, four hundred sixty-one".