51206664521153 has 4 divisors (see below), whose sum is σ = 53433041239488. Its totient is φ = 48980287802820.

The previous prime is 51206664521147. The next prime is 51206664521191. The reversal of 51206664521153 is 35112546660215.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51206664521153 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51206664521098 and 51206664521107.

It is not an unprimeable number, because it can be changed into a prime (51206664521113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1113188359133 + ... + 1113188359178.

It is an arithmetic number, because the mean of its divisors is an integer number (13358260309872).

Almost surely, 2^{51206664521153} is an apocalyptic number.

It is an amenable number.

51206664521153 is a deficient number, since it is larger than the sum of its proper divisors (2226376718335).

51206664521153 is a wasteful number, since it uses less digits than its factorization.

51206664521153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2226376718334.

The product of its (nonzero) digits is 1296000, while the sum is 47.

The spelling of 51206664521153 in words is "fifty-one trillion, two hundred six billion, six hundred sixty-four million, five hundred twenty-one thousand, one hundred fifty-three".