51219827705616 has 40 divisors (see below), whose sum is σ = 132318650231040. Its totient is φ = 17073177580416.

The previous prime is 51219827705591. The next prime is 51219827705771. The reversal of 51219827705616 is 61650772891215.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 51219827705616.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5601825 + ... + 11568063.

It is an arithmetic number, because the mean of its divisors is an integer number (3307966255776).

Almost surely, 2^{51219827705616} is an apocalyptic number.

It is an amenable number.

51219827705616 is an abundant number, since it is smaller than the sum of its proper divisors (81098822525424).

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

51219827705616 is a wasteful number, since it uses less digits than its factorization.

51219827705616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6145103 (or 6145097 counting only the distinct ones).

The product of its (nonzero) digits is 12700800, while the sum is 60.

The spelling of 51219827705616 in words is "fifty-one trillion, two hundred nineteen billion, eight hundred twenty-seven million, seven hundred five thousand, six hundred sixteen".