51640663041211 has 8 divisors (see below), whose sum is σ = 51719160175200. Its totient is φ = 51562167032640.

The previous prime is 51640663041181. The next prime is 51640663041277. The reversal of 51640663041211 is 11214036604615.

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-51640663041211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51640663041911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166336935 + ... + 166647103.

It is an arithmetic number, because the mean of its divisors is an integer number (6464895021900).

Almost surely, 2^{51640663041211} is an apocalyptic number.

51640663041211 is a deficient number, since it is larger than the sum of its proper divisors (78497133989).

51640663041211 is a wasteful number, since it uses less digits than its factorization.

51640663041211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562709.

The product of its (nonzero) digits is 103680, while the sum is 40.

Adding to 51640663041211 its reverse (11214036604615), we get a palindrome (62854699645826).

The spelling of 51640663041211 in words is "fifty-one trillion, six hundred forty billion, six hundred sixty-three million, forty-one thousand, two hundred eleven".