1148331306781 has 2 divisors, whose sum is σ = 1148331306782. Its totient is φ = 1148331306780.

The previous prime is 1148331306679. The next prime is 1148331306797. The reversal of 1148331306781 is 1876031338411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1081423207225 + 66908099556 = 1039915^2 + 258666^2 .

It is a cyclic number.

It is not a de Polignac number, because 1148331306781 - 2¹⁹ = 1148330782493 is a prime.

It is a super-2 number, since 2×1148331306781² (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 (1148331301781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 574165653390 + 574165653391.

It is an arithmetic number, because the mean of its divisors is an integer number (574165653391).

Almost surely, 2^{1148331306781} is an apocalyptic number.

It is an amenable number.

1148331306781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1148331306781 is an equidigital number, since it uses as much as digits as its factorization.

1148331306781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 1148331306781 in words is "one trillion, one hundred forty-eight billion, three hundred thirty-one million, three hundred six thousand, seven hundred eighty-one".