7861546361 has 2 divisors, whose sum is σ = 7861546362. Its totient is φ = 7861546360.

The previous prime is 7861546331. The next prime is 7861546367. The reversal of 7861546361 is 1636451687.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4518393961 + 3343152400 = 67219^2 + 57820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7861546361 is a prime.

It is a super-2 number, since 2×7861546361² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7861546367) 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, 3930773180 + 3930773181.

It is an arithmetic number, because the mean of its divisors is an integer number (3930773181).

Almost surely, 2^7861546361 is an apocalyptic number.

It is an amenable number.

7861546361 is a deficient number, since it is larger than the sum of its proper divisors (1).

7861546361 is an equidigital number, since it uses as much as digits as its factorization.

7861546361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 47.

The square root of 7861546361 is about 88665.3616752337. The cubic root of 7861546361 is about 1988.3949888514.

The spelling of 7861546361 in words is "seven billion, eight hundred sixty-one million, five hundred forty-six thousand, three hundred sixty-one".