646263131202 has 128 divisors (see below), whose sum is σ = 1652085227520. Its totient is φ = 185496514560.

The previous prime is 646263131191. The next prime is 646263131249. The reversal of 646263131202 is 202131362646.

646263131202 is a `hidden beast` number, since 6 + 4 + 6 + 2 + 631 + 3 + 12 + 0 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1108927 + ... + 1588157.

It is an arithmetic number, because the mean of its divisors is an integer number (12906915840).

Almost surely, 2^646263131202 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646263131202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (826042613760).

646263131202 is an abundant number, since it is smaller than the sum of its proper divisors (1005822096318).

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

646263131202 is a wasteful number, since it uses less digits than its factorization.

646263131202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479385 (or 479379 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

Adding to 646263131202 its reverse (202131362646), we get a palindrome (848394493848).

The spelling of 646263131202 in words is "six hundred forty-six billion, two hundred sixty-three million, one hundred thirty-one thousand, two hundred two".