6440870262 has 16 divisors (see below), whose sum is σ = 13124792880. Its totient is φ = 2106448032.

The previous prime is 6440870231. The next prime is 6440870273. The reversal of 6440870262 is 2620780446.

It is a self number, because there is not a number n which added to its sum of digits gives 6440870262.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10126837 + ... + 10127472.

It is an arithmetic number, because the mean of its divisors is an integer number (820299555).

Almost surely, 2^6440870262 is an apocalyptic number.

6440870262 is an abundant number, since it is smaller than the sum of its proper divisors (6683922618).

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

6440870262 is a wasteful number, since it uses less digits than its factorization.

6440870262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20254367.

The product of its (nonzero) digits is 129024, while the sum is 39.

The square root of 6440870262 is about 80255.0326272440. The cubic root of 6440870262 is about 1860.5792952223.

The spelling of 6440870262 in words is "six billion, four hundred forty million, eight hundred seventy thousand, two hundred sixty-two".