867863642959971 has 24 divisors (see below), whose sum is σ = 1432744357075200. Its totient is φ = 495894193626096.

The previous prime is 867863642959897. The next prime is 867863642959979. The reversal of 867863642959971 is 179959246368768.

It is a happy number.

867863642959971 is a `hidden beast` number, since 8 + 6 + 7 + 8 + 6 + 3 + 6 + 4 + 2 + 9 + 599 + 7 + 1 = 666.

It is not a de Polignac number, because 867863642959971 - 2¹⁸ = 867863642697827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (867863642959979) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 386205021 + ... + 388445678.

It is an arithmetic number, because the mean of its divisors is an integer number (59697681544800).

Almost surely, 2^{867863642959971} is an apocalyptic number.

867863642959971 is a deficient number, since it is larger than the sum of its proper divisors (564880714115229).

867863642959971 is a wasteful number, since it uses less digits than its factorization.

867863642959971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774668495 (or 774668492 counting only the distinct ones).

The product of its digits is 59256852480, while the sum is 90.

The spelling of 867863642959971 in words is "eight hundred sixty-seven trillion, eight hundred sixty-three billion, six hundred forty-two million, nine hundred fifty-nine thousand, nine hundred seventy-one".