8618864940871 has 4 divisors (see below), whose sum is σ = 8619288555112. Its totient is φ = 8618441326632.

The previous prime is 8618864940869. The next prime is 8618864940949. The reversal of 8618864940871 is 1780494688168.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8618864940871 - 2¹ = 8618864940869 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8618864940871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8618864940821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211776600 + ... + 211817293.

It is an arithmetic number, because the mean of its divisors is an integer number (2154822138778).

Almost surely, 2^{8618864940871} is an apocalyptic number.

8618864940871 is a deficient number, since it is larger than the sum of its proper divisors (423614241).

8618864940871 is a wasteful number, since it uses less digits than its factorization.

8618864940871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423614240.

The product of its (nonzero) digits is 148635648, while the sum is 70.

The spelling of 8618864940871 in words is "eight trillion, six hundred eighteen billion, eight hundred sixty-four million, nine hundred forty thousand, eight hundred seventy-one".