406186974856 has 48 divisors (see below), whose sum is σ = 826606373760. Its totient is φ = 187035675840.

The previous prime is 406186974847. The next prime is 406186974857. The reversal of 406186974856 is 658479681604.

It is not an unprimeable number, because it can be changed into a prime (406186974857) 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, 234181 + ... + 931243.

It is an arithmetic number, because the mean of its divisors is an integer number (17220966120).

Almost surely, 2^406186974856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 406186974856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (413303186880).

406186974856 is an abundant number, since it is smaller than the sum of its proper divisors (420419398904).

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

406186974856 is a wasteful number, since it uses less digits than its factorization.

406186974856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697526 (or 697509 counting only the distinct ones).

The product of its (nonzero) digits is 69672960, while the sum is 64.

The spelling of 406186974856 in words is "four hundred six billion, one hundred eighty-six million, nine hundred seventy-four thousand, eight hundred fifty-six".