7681264391077 has 2 divisors, whose sum is σ = 7681264391078. Its totient is φ = 7681264391076.

The previous prime is 7681264391041. The next prime is 7681264391107. The reversal of 7681264391077 is 7701934621867.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6849139131396 + 832125259681 = 2617086^2 + 912209^2 .

It is an emirp because it is prime and its reverse (7701934621867) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7681264391077 - 2³⁹ = 7131508577189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7681264391377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3840632195538 + 3840632195539.

It is an arithmetic number, because the mean of its divisors is an integer number (3840632195539).

Almost surely, 2^{7681264391077} is an apocalyptic number.

It is an amenable number.

7681264391077 is a deficient number, since it is larger than the sum of its proper divisors (1).

7681264391077 is an equidigital number, since it uses as much as digits as its factorization.

7681264391077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21337344, while the sum is 61.

The spelling of 7681264391077 in words is "seven trillion, six hundred eighty-one billion, two hundred sixty-four million, three hundred ninety-one thousand, seventy-seven".