6781011656 has 32 divisors (see below), whose sum is σ = 12816722880. Its totient is φ = 3363326400.

The previous prime is 6781011619. The next prime is 6781011661. The reversal of 6781011656 is 6561101876.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 518510 + ... + 531426.

It is an arithmetic number, because the mean of its divisors is an integer number (400522590).

Almost surely, 2^6781011656 is an apocalyptic number.

It is an amenable number.

6781011656 is a deficient number, since it is larger than the sum of its proper divisors (6035711224).

6781011656 is a wasteful number, since it uses less digits than its factorization.

6781011656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13445 (or 13441 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 6781011656 is about 82346.8982779558. The cubic root of 6781011656 is about 1892.7713936325.

The spelling of 6781011656 in words is "six billion, seven hundred eighty-one million, eleven thousand, six hundred fifty-six".