7727681147377 has 2 divisors, whose sum is σ = 7727681147378. Its totient is φ = 7727681147376.

The previous prime is 7727681147357. The next prime is 7727681147401. The reversal of 7727681147377 is 7737411867277.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5384237596816 + 2343443550561 = 2320396^2 + 1530831^2 .

It is an emirp because it is prime and its reverse (7737411867277) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7727681147377 is a prime.

It is not a weakly prime, because it can be changed into another prime (7727681147327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3863840573688 + 3863840573689.

It is an arithmetic number, because the mean of its divisors is an integer number (3863840573689).

Almost surely, 2^{7727681147377} is an apocalyptic number.

It is an amenable number.

7727681147377 is a deficient number, since it is larger than the sum of its proper divisors (1).

7727681147377 is an equidigital number, since it uses as much as digits as its factorization.

7727681147377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 135531648, while the sum is 67.

The spelling of 7727681147377 in words is "seven trillion, seven hundred twenty-seven billion, six hundred eighty-one million, one hundred forty-seven thousand, three hundred seventy-seven".