646120331211 has 16 divisors (see below), whose sum is σ = 874624220928. Its totient is φ = 424185669600.

The previous prime is 646120331039. The next prime is 646120331257. The reversal of 646120331211 is 112133021646.

It is not a de Polignac number, because 646120331211 - 2⁹ = 646120330699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (646120331011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148426 + ... + 1146416.

It is an arithmetic number, because the mean of its divisors is an integer number (54664013808).

Almost surely, 2^646120331211 is an apocalyptic number.

646120331211 is a deficient number, since it is larger than the sum of its proper divisors (228503889717).

646120331211 is a wasteful number, since it uses less digits than its factorization.

646120331211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001282.

The product of its (nonzero) digits is 5184, while the sum is 30.

Adding to 646120331211 its reverse (112133021646), we get a palindrome (758253352857).

The spelling of 646120331211 in words is "six hundred forty-six billion, one hundred twenty million, three hundred thirty-one thousand, two hundred eleven".