400212445446660 has 144 divisors (see below), whose sum is σ = 1407689395072128. Its totient is φ = 83161027614720.

The previous prime is 400212445446647. The next prime is 400212445446683. The reversal of 400212445446660 is 66644544212004.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3937497837 + ... + 3937599476.

It is an arithmetic number, because the mean of its divisors is an integer number (9775620799112).

Almost surely, 2^{400212445446660} is an apocalyptic number.

It is an amenable number.

400212445446660 is an abundant number, since it is smaller than the sum of its proper divisors (1007476949625468).

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

400212445446660 is a wasteful number, since it uses less digits than its factorization.

400212445446660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7875097354 (or 7875097341 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 48.

Adding to 400212445446660 its reverse (66644544212004), we get a palindrome (466856989658664).

The spelling of 400212445446660 in words is "four hundred trillion, two hundred twelve billion, four hundred forty-five million, four hundred forty-six thousand, six hundred sixty".