656166304316242 has 32 divisors (see below), whose sum is σ = 1003940043099840. Its totient is φ = 321557899273920.

The previous prime is 656166304316183. The next prime is 656166304316267. The reversal of 656166304316242 is 242613403661656.

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, 1995541984 + ... + 1995870772.

It is an arithmetic number, because the mean of its divisors is an integer number (31373126346870).

Almost surely, 2^{656166304316242} is an apocalyptic number.

656166304316242 is a deficient number, since it is larger than the sum of its proper divisors (347773738783598).

656166304316242 is a wasteful number, since it uses less digits than its factorization.

656166304316242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386938.

The product of its (nonzero) digits is 22394880, while the sum is 55.

Adding to 656166304316242 its reverse (242613403661656), we get a palindrome (898779707977898).

The spelling of 656166304316242 in words is "six hundred fifty-six trillion, one hundred sixty-six billion, three hundred four million, three hundred sixteen thousand, two hundred forty-two".