8820642377 has 2 divisors, whose sum is σ = 8820642378. Its totient is φ = 8820642376.

The previous prime is 8820642277. The next prime is 8820642409. The reversal of 8820642377 is 7732460288.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8164206736 + 656435641 = 90356^2 + 25621^2 .

It is a cyclic number.

It is not a de Polignac number, because 8820642377 - 2¹⁶ = 8820576841 is a prime.

It is not a weakly prime, because it can be changed into another prime (8820642277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4410321188 + 4410321189.

It is an arithmetic number, because the mean of its divisors is an integer number (4410321189).

Almost surely, 2^8820642377 is an apocalyptic number.

It is an amenable number.

8820642377 is a deficient number, since it is larger than the sum of its proper divisors (1).

8820642377 is an equidigital number, since it uses as much as digits as its factorization.

8820642377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 903168, while the sum is 47.

The square root of 8820642377 is about 93918.2749894822. The cubic root of 8820642377 is about 2066.1732669379.

The spelling of 8820642377 in words is "eight billion, eight hundred twenty million, six hundred forty-two thousand, three hundred seventy-seven".