51678669216 has 24 divisors (see below), whose sum is σ = 135656506944. Its totient is φ = 17226223040.

The previous prime is 51678669209. The next prime is 51678669241. The reversal of 51678669216 is 61296687615.

It is a tau number, because it is divible by the number of its divisors (24).

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, 269159640 + ... + 269159831.

It is an arithmetic number, because the mean of its divisors is an integer number (5652354456).

Almost surely, 2^51678669216 is an apocalyptic number.

It is an amenable number.

51678669216 is an abundant number, since it is smaller than the sum of its proper divisors (83977837728).

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

51678669216 is a wasteful number, since it uses less digits than its factorization.

51678669216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538319484 (or 538319476 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 57.

The spelling of 51678669216 in words is "fifty-one billion, six hundred seventy-eight million, six hundred sixty-nine thousand, two hundred sixteen".