858506021136 has 45 divisors (see below), whose sum is σ = 2402655606949. Its totient is φ = 286164967488.

The previous prime is 858506021119. The next prime is 858506021183. The reversal of 858506021136 is 631120605858.

The square root of 858506021136 is 926556.

It is a perfect power (a square), and thus also a powerful number.

858506021136 is a `hidden beast` number, since 8 + 5 + 8 + 5 + 0 + 602 + 1 + 1 + 36 = 666.

It can be written as a sum of positive squares in only one way, i.e., 837115203600 + 21390817536 = 914940^2 + 146256^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 858506021091 and 858506021100.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11080066 + ... + 11157278.

Almost surely, 2^858506021136 is an apocalyptic number.

858506021136 is the 926556-th square number.

It is an amenable number.

858506021136 is an abundant number, since it is smaller than the sum of its proper divisors (1544149585813).

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

858506021136 is an frugal number, since it uses more digits than its factorization.

858506021136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154440 (or 77218 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 858506021136 in words is "eight hundred fifty-eight billion, five hundred six million, twenty-one thousand, one hundred thirty-six".