6440768262 has 12 divisors (see below), whose sum is σ = 13954997940. Its totient is φ = 2146922748.

The previous prime is 6440768251. The next prime is 6440768309. The reversal of 6440768262 is 2628670446.

6440768262 is a `hidden beast` number, since 6 + 440 + 76 + 82 + 62 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 178910212 + ... + 178910247.

It is an arithmetic number, because the mean of its divisors is an integer number (1162916495).

Almost surely, 2^6440768262 is an apocalyptic number.

6440768262 is an abundant number, since it is smaller than the sum of its proper divisors (7514229678).

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

6440768262 is a wasteful number, since it uses less digits than its factorization.

6440768262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357820467 (or 357820464 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The square root of 6440768262 is about 80254.3971505612. The cubic root of 6440768262 is about 1860.5694735635.

The spelling of 6440768262 in words is "six billion, four hundred forty million, seven hundred sixty-eight thousand, two hundred sixty-two".