6785740638 has 24 divisors (see below), whose sum is σ = 15567288048. Its totient is φ = 2128859712.

The previous prime is 6785740597. The next prime is 6785740639. The reversal of 6785740638 is 8360475876.

6785740638 is a `hidden beast` number, since 6 + 7 + 8 + 574 + 0 + 63 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6785740639) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 11087506 + ... + 11088117.

It is an arithmetic number, because the mean of its divisors is an integer number (648637002).

Almost surely, 2^6785740638 is an apocalyptic number.

6785740638 is an abundant number, since it is smaller than the sum of its proper divisors (8781547410).

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

6785740638 is a wasteful number, since it uses less digits than its factorization.

6785740638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22175648 (or 22175645 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 54.

The square root of 6785740638 is about 82375.6070569437. The cubic root of 6785740638 is about 1893.2112887578.

The spelling of 6785740638 in words is "six billion, seven hundred eighty-five million, seven hundred forty thousand, six hundred thirty-eight".