1075251844781 has 2 divisors, whose sum is σ = 1075251844782. Its totient is φ = 1075251844780.

The previous prime is 1075251844747. The next prime is 1075251844879. The reversal of 1075251844781 is 1874481525701.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 684334290025 + 390917554756 = 827245^2 + 625234^2 .

It is an emirp because it is prime and its reverse (1874481525701) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1075251844781 is a prime.

It is a super-2 number, since 2×1075251844781² (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 (1075251849781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 537625922390 + 537625922391.

It is an arithmetic number, because the mean of its divisors is an integer number (537625922391).

Almost surely, 2^{1075251844781} is an apocalyptic number.

It is an amenable number.

1075251844781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1075251844781 is an equidigital number, since it uses as much as digits as its factorization.

1075251844781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2508800, while the sum is 53.

The spelling of 1075251844781 in words is "one trillion, seventy-five billion, two hundred fifty-one million, eight hundred forty-four thousand, seven hundred eighty-one".