8727768641 has 4 divisors (see below), whose sum is σ = 8736702852. Its totient is φ = 8718834432.

The previous prime is 8727768629. The next prime is 8727768653. The reversal of 8727768641 is 1468677278.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1468677278 = 2 ⋅734338639.

It is an interprime number because it is at equal distance from previous prime (8727768629) and next prime (8727768653).

It can be written as a sum of positive squares in 2 ways, for example, as 4664343616 + 4063425025 = 68296^2 + 63745^2 .

It is a cyclic number.

It is not a de Polignac number, because 8727768641 - 2²² = 8723574337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8727768671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4465640 + ... + 4467593.

It is an arithmetic number, because the mean of its divisors is an integer number (2184175713).

Almost surely, 2^8727768641 is an apocalyptic number.

It is an amenable number.

8727768641 is a deficient number, since it is larger than the sum of its proper divisors (8934211).

8727768641 is an equidigital number, since it uses as much as digits as its factorization.

8727768641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8934210.

The product of its digits is 6322176, while the sum is 56.

The square root of 8727768641 is about 93422.5274813308. The cubic root of 8727768641 is about 2058.8959931795.

The spelling of 8727768641 in words is "eight billion, seven hundred twenty-seven million, seven hundred sixty-eight thousand, six hundred forty-one".