51667713775208 has 8 divisors (see below), whose sum is σ = 96876963328530. Its totient is φ = 25833856887600.

The previous prime is 51667713775201. The next prime is 51667713775261. The reversal of 51667713775208 is 80257731776615.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 50841719994244 + 825993780964 = 7130338^2 + 908842^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (51667713775201) 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 as a sum of consecutive naturals, namely, 3229232110943 + ... + 3229232110958.

Almost surely, 2^{51667713775208} is an apocalyptic number.

It is an amenable number.

51667713775208 is a deficient number, since it is larger than the sum of its proper divisors (45209249553322).

51667713775208 is a wasteful number, since it uses less digits than its factorization.

51667713775208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6458464221907 (or 6458464221903 counting only the distinct ones).

The product of its (nonzero) digits is 103723200, while the sum is 65.

The spelling of 51667713775208 in words is "fifty-one trillion, six hundred sixty-seven billion, seven hundred thirteen million, seven hundred seventy-five thousand, two hundred eight".