51206664520411 has 4 divisors (see below), whose sum is σ = 51207594777000. Its totient is φ = 51205734263824.

The previous prime is 51206664520397. The next prime is 51206664520423. The reversal of 51206664520411 is 11402546660215.

51206664520411 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51206664520411 - 2⁷ = 51206664520283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51206664550411) 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 3 ways as a sum of consecutive naturals, for example, 465045721 + ... + 465155818.

It is an arithmetic number, because the mean of its divisors is an integer number (12801898694250).

Almost surely, 2^{51206664520411} is an apocalyptic number.

51206664520411 is a deficient number, since it is larger than the sum of its proper divisors (930256589).

51206664520411 is an equidigital number, since it uses as much as digits as its factorization.

51206664520411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 930256588.

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 51206664520411 in words is "fifty-one trillion, two hundred six billion, six hundred sixty-four million, five hundred twenty thousand, four hundred eleven".