858478753917 has 12 divisors (see below), whose sum is σ = 1240095916540. Its totient is φ = 572286377088.

The previous prime is 858478753889. The next prime is 858478753919. The reversal of 858478753917 is 719357874858.

It is a happy number.

858478753917 is a `hidden beast` number, since 8 + 5 + 8 + 4 + 7 + 87 + 539 + 1 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 277843897881 + 580634856036 = 527109^2 + 761994^2 .

It is not a de Polignac number, because 858478753917 - 2¹¹ = 858478751869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (858478753919) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2566348 + ... + 2881509.

Almost surely, 2^858478753917 is an apocalyptic number.

It is an amenable number.

858478753917 is a deficient number, since it is larger than the sum of its proper divisors (381617162623).

858478753917 is a wasteful number, since it uses less digits than its factorization.

858478753917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5465372 (or 5465369 counting only the distinct ones).

The product of its digits is 474163200, while the sum is 72.

The spelling of 858478753917 in words is "eight hundred fifty-eight billion, four hundred seventy-eight million, seven hundred fifty-three thousand, nine hundred seventeen".