8624440861 has 2 divisors, whose sum is σ = 8624440862. Its totient is φ = 8624440860.

The previous prime is 8624440859. The next prime is 8624440873. The reversal of 8624440861 is 1680444268.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7364900761 + 1259540100 = 85819^2 + 35490^2 .

It is a cyclic number.

It is not a de Polignac number, because 8624440861 - 2¹ = 8624440859 is a prime.

Together with 8624440859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8624440061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4312220430 + 4312220431.

It is an arithmetic number, because the mean of its divisors is an integer number (4312220431).

Almost surely, 2^8624440861 is an apocalyptic number.

It is an amenable number.

8624440861 is a deficient number, since it is larger than the sum of its proper divisors (1).

8624440861 is an equidigital number, since it uses as much as digits as its factorization.

8624440861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 294912, while the sum is 43.

The square root of 8624440861 is about 92867.8677530609. The cubic root of 8624440861 is about 2050.7386480390.

The spelling of 8624440861 in words is "eight billion, six hundred twenty-four million, four hundred forty thousand, eight hundred sixty-one".