7861804739081 has 2 divisors, whose sum is σ = 7861804739082. Its totient is φ = 7861804739080.

The previous prime is 7861804739053. The next prime is 7861804739099. The reversal of 7861804739081 is 1809374081687.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7767591961600 + 94212777481 = 2787040^2 + 306941^2 .

It is a cyclic number.

It is not a de Polignac number, because 7861804739081 - 2³⁴ = 7844624869897 is a prime.

It is a super-2 number, since 2×7861804739081² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7861804739981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3930902369540 + 3930902369541.

It is an arithmetic number, because the mean of its divisors is an integer number (3930902369541).

Almost surely, 2^{7861804739081} is an apocalyptic number.

It is an amenable number.

7861804739081 is a deficient number, since it is larger than the sum of its proper divisors (1).

7861804739081 is an equidigital number, since it uses as much as digits as its factorization.

7861804739081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16257024, while the sum is 62.

The spelling of 7861804739081 in words is "seven trillion, eight hundred sixty-one billion, eight hundred four million, seven hundred thirty-nine thousand, eighty-one".