858165406380 has 48 divisors (see below), whose sum is σ = 2669847932640. Its totient is φ = 228844108224.

The previous prime is 858165406379. The next prime is 858165406447. The reversal of 858165406380 is 83604561858.

858165406380 is a `hidden beast` number, since 8 + 5 + 8 + 16 + 540 + 6 + 3 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 794597059 + ... + 794598138.

It is an arithmetic number, because the mean of its divisors is an integer number (55621831930).

Almost surely, 2^858165406380 is an apocalyptic number.

It is an amenable number.

858165406380 is an abundant number, since it is smaller than the sum of its proper divisors (1811682526260).

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

858165406380 is a wasteful number, since it uses less digits than its factorization.

858165406380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589195215 (or 1589195207 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 54.

The spelling of 858165406380 in words is "eight hundred fifty-eight billion, one hundred sixty-five million, four hundred six thousand, three hundred eighty".