646234462020 has 96 divisors (see below), whose sum is σ = 2068329489408. Its totient is φ = 147683647872.

The previous prime is 646234462007. The next prime is 646234462057. The reversal of 646234462020 is 20264432646.

646234462020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 646234462020.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2198167 + ... + 2474753.

It is an arithmetic number, because the mean of its divisors is an integer number (21545098848).

Almost surely, 2^646234462020 is an apocalyptic number.

646234462020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

646234462020 is an abundant number, since it is smaller than the sum of its proper divisors (1422095027388).

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

646234462020 is a wasteful number, since it uses less digits than its factorization.

646234462020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282169 (or 282167 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 39.

Adding to 646234462020 its reverse (20264432646), we get a palindrome (666498894666).

The spelling of 646234462020 in words is "six hundred forty-six billion, two hundred thirty-four million, four hundred sixty-two thousand, twenty".