6781571755338 has 8 divisors (see below), whose sum is σ = 13563143510688. Its totient is φ = 2260523918444.

The previous prime is 6781571755291. The next prime is 6781571755367. The reversal of 6781571755338 is 8335571751876.

It is a sphenic number, since it is the product of 3 distinct primes.

6781571755338 is an admirable 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 3 ways as a sum of consecutive naturals, for example, 565130979606 + ... + 565130979617.

It is an arithmetic number, because the mean of its divisors is an integer number (1695392938836).

Almost surely, 2^{6781571755338} is an apocalyptic number.

6781571755338 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

6781571755338 is a wasteful number, since it uses less digits than its factorization.

6781571755338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130261959228.

The product of its digits is 148176000, while the sum is 66.

The spelling of 6781571755338 in words is "six trillion, seven hundred eighty-one billion, five hundred seventy-one million, seven hundred fifty-five thousand, three hundred thirty-eight".