7281125492785 has 8 divisors (see below), whose sum is σ = 8737378289640. Its totient is φ = 5824881928704.

The previous prime is 7281125492701. The next prime is 7281125492801. The reversal of 7281125492785 is 5872945211827.

It can be written as a sum of positive squares in 4 ways, for example, as 791532281761 + 6489593211024 = 889681^2 + 2547468^2 .

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-7281125492785 is a prime.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 435040 + ... + 3840769.

It is an arithmetic number, because the mean of its divisors is an integer number (1092172286205).

Almost surely, 2^{7281125492785} is an apocalyptic number.

It is an amenable number.

7281125492785 is a deficient number, since it is larger than the sum of its proper divisors (1456252796855).

7281125492785 is a wasteful number, since it uses less digits than its factorization.

7281125492785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4616387.

The product of its digits is 22579200, while the sum is 61.

The spelling of 7281125492785 in words is "seven trillion, two hundred eighty-one billion, one hundred twenty-five million, four hundred ninety-two thousand, seven hundred eighty-five".