8771396985864 has 64 divisors (see below), whose sum is σ = 24435207950400. Its totient is φ = 2915373036672.

The previous prime is 8771396985851. The next prime is 8771396985881. The reversal of 8771396985864 is 4685896931778.

8771396985864 is a `hidden beast` number, since 8 + 7 + 71 + 396 + 9 + 85 + 86 + 4 = 666.

It is a super-3 number, since 3×8771396985864³ (a number of 40 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58438477 + ... + 58588380.

It is an arithmetic number, because the mean of its divisors is an integer number (381800124225).

Almost surely, 2^{8771396985864} is an apocalyptic number.

It is an amenable number.

8771396985864 is an abundant number, since it is smaller than the sum of its proper divisors (15663810964536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8771396985864 is a wasteful number, since it uses less digits than its factorization.

8771396985864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117027219 (or 117027209 counting only the distinct ones).

The product of its digits is 4389396480, while the sum is 81.

The spelling of 8771396985864 in words is "eight trillion, seven hundred seventy-one billion, three hundred ninety-six million, nine hundred eighty-five thousand, eight hundred sixty-four".