6493306388 has 12 divisors (see below), whose sum is σ = 11364846612. Its totient is φ = 3246207360.

The previous prime is 6493306343. The next prime is 6493306397. The reversal of 6493306388 is 8836033946.

It can be written as a sum of positive squares in 2 ways, for example, as 1916513284 + 4576793104 = 43778^2 + 67652^2 .

It is a super-3 number, since 3×6493306388³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77543 + ... + 137838.

It is an arithmetic number, because the mean of its divisors is an integer number (947070551).

Almost surely, 2^6493306388 is an apocalyptic number.

It is an amenable number.

6493306388 is a deficient number, since it is larger than the sum of its proper divisors (4871540224).

6493306388 is a wasteful number, since it uses less digits than its factorization.

6493306388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222922 (or 222920 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 50.

The square root of 6493306388 is about 80581.0547709572. The cubic root of 6493306388 is about 1865.6147434744.

The spelling of 6493306388 in words is "six billion, four hundred ninety-three million, three hundred six thousand, three hundred eighty-eight".