8640042377 has 2 divisors, whose sum is σ = 8640042378. Its totient is φ = 8640042376.

The previous prime is 8640042353. The next prime is 8640042401. The reversal of 8640042377 is 7732400468.

It is a balanced prime because it is at equal distance from previous prime (8640042353) and next prime (8640042401).

It can be written as a sum of positive squares in only one way, i.e., 8593475401 + 46566976 = 92701^2 + 6824^2 .

It is a cyclic number.

It is not a de Polignac number, because 8640042377 - 2²⁰ = 8638993801 is a prime.

It is not a weakly prime, because it can be changed into another prime (8640042317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4320021188 + 4320021189.

It is an arithmetic number, because the mean of its divisors is an integer number (4320021189).

Almost surely, 2^8640042377 is an apocalyptic number.

It is an amenable number.

8640042377 is a deficient number, since it is larger than the sum of its proper divisors (1).

8640042377 is an equidigital number, since it uses as much as digits as its factorization.

8640042377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225792, while the sum is 41.

The square root of 8640042377 is about 92951.8282606641. The cubic root of 8640042377 is about 2051.9744908052.

The spelling of 8640042377 in words is "eight billion, six hundred forty million, forty-two thousand, three hundred seventy-seven".