858206081040 has 480 divisors, whose sum is σ = 3371704697088. Its totient is φ = 176745676800.

The previous prime is 858206081027. The next prime is 858206081059. The reversal of 858206081040 is 40180602858.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 858206080983 and 858206081001.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 22951960 + ... + 22989320.

Almost surely, 2^858206081040 is an apocalyptic number.

858206081040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 858206081040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1685852348544).

858206081040 is an abundant number, since it is smaller than the sum of its proper divisors (2513498616048).

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

858206081040 is a wasteful number, since it uses less digits than its factorization.

858206081040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37519 (or 37502 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 42.

Adding to 858206081040 its reverse (40180602858), we get a palindrome (898386683898).

The spelling of 858206081040 in words is "eight hundred fifty-eight billion, two hundred six million, eighty-one thousand, forty".