6511780634 has 8 divisors (see below), whose sum is σ = 9776372160. Its totient is φ = 3252989916.

The previous prime is 6511780621. The next prime is 6511780673. The reversal of 6511780634 is 4360871156.

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

It is a junction number, because it is equal to n+sod(n) for n = 6511780591 and 6511780600.

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 3 ways as a sum of consecutive naturals, for example, 1447394 + ... + 1451885.

It is an arithmetic number, because the mean of its divisors is an integer number (1222046520).

Almost surely, 2^6511780634 is an apocalyptic number.

6511780634 is a deficient number, since it is larger than the sum of its proper divisors (3264591526).

6511780634 is a wasteful number, since it uses less digits than its factorization.

6511780634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2900404.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 6511780634 is about 80695.6047997659. The cubic root of 6511780634 is about 1867.3823684066.

The spelling of 6511780634 in words is "six billion, five hundred eleven million, seven hundred eighty thousand, six hundred thirty-four".