858934817772 has 48 divisors (see below), whose sum is σ = 2156862389472. Its totient is φ = 265052206080.

The previous prime is 858934817759. The next prime is 858934817893. The reversal of 858934817772 is 277718439858.

It is a junction number, because it is equal to n+sod(n) for n = 858934817697 and 858934817706.

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, 34499563 + ... + 34524450.

It is an arithmetic number, because the mean of its divisors is an integer number (44934633114).

Almost surely, 2^858934817772 is an apocalyptic number.

It is an amenable number.

858934817772 is an abundant number, since it is smaller than the sum of its proper divisors (1297927571700).

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

858934817772 is a wasteful number, since it uses less digits than its factorization.

858934817772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69024098 (or 69024096 counting only the distinct ones).

The product of its digits is 189665280, while the sum is 69.

The spelling of 858934817772 in words is "eight hundred fifty-eight billion, nine hundred thirty-four million, eight hundred seventeen thousand, seven hundred seventy-two".