863854660028871 has 192 divisors, whose sum is σ = 1496902564085760. Its totient is φ = 469875129914880.

The previous prime is 863854660028869. The next prime is 863854660028879. The reversal of 863854660028871 is 178820066458368.

863854660028871 is a `hidden beast` number, since 8 + 6 + 3 + 8 + 5 + 4 + 6 + 600 + 2 + 8 + 8 + 7 + 1 = 666.

It is not a de Polignac number, because 863854660028871 - 2¹ = 863854660028869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 863854660028871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863854660028879) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 14225185110 + ... + 14225245836.

It is an arithmetic number, because the mean of its divisors is an integer number (7796367521280).

Almost surely, 2^{863854660028871} is an apocalyptic number.

863854660028871 is a deficient number, since it is larger than the sum of its proper divisors (633047904056889).

863854660028871 is a wasteful number, since it uses less digits than its factorization.

863854660028871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61714 (or 61711 counting only the distinct ones).

The product of its (nonzero) digits is 743178240, while the sum is 72.

The spelling of 863854660028871 in words is "eight hundred sixty-three trillion, eight hundred fifty-four billion, six hundred sixty million, twenty-eight thousand, eight hundred seventy-one".