51556640210211 has 8 divisors (see below), whose sum is σ = 69236735055040. Its totient is φ = 34123819419432.

The previous prime is 51556640210147. The next prime is 51556640210221. The reversal of 51556640210211 is 11201204665515.

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

It is not a de Polignac number, because 51556640210211 - 2⁶ = 51556640210147 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51556640210211.

It is not an unprimeable number, because it can be changed into a prime (51556640210221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61818513025 + ... + 61818513858.

It is an arithmetic number, because the mean of its divisors is an integer number (8654591881880).

Almost surely, 2^{51556640210211} is an apocalyptic number.

51556640210211 is a deficient number, since it is larger than the sum of its proper divisors (17680094844829).

51556640210211 is a wasteful number, since it uses less digits than its factorization.

51556640210211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123637027025.

The product of its (nonzero) digits is 72000, while the sum is 39.

Adding to 51556640210211 its reverse (11201204665515), we get a palindrome (62757844875726).

The spelling of 51556640210211 in words is "fifty-one trillion, five hundred fifty-six billion, six hundred forty million, two hundred ten thousand, two hundred eleven".