51216565461311 has 8 divisors (see below), whose sum is σ = 54229367840400. Its totient is φ = 48203770108288.

The previous prime is 51216565461289. The next prime is 51216565461361. The reversal of 51216565461311 is 11316456561215.

51216565461311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51216565461311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51216565461361) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 24267725 + ... + 26293641.

It is an arithmetic number, because the mean of its divisors is an integer number (6778670980050).

Almost surely, 2^{51216565461311} is an apocalyptic number.

51216565461311 is a deficient number, since it is larger than the sum of its proper divisors (3012802379089).

51216565461311 is a wasteful number, since it uses less digits than its factorization.

51216565461311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3513033.

The product of its digits is 648000, while the sum is 47.

The spelling of 51216565461311 in words is "fifty-one trillion, two hundred sixteen billion, five hundred sixty-five million, four hundred sixty-one thousand, three hundred eleven".