51217095016 has 8 divisors (see below), whose sum is σ = 96032053170. Its totient is φ = 25608547504.

The previous prime is 51217094989. The next prime is 51217095043. The reversal of 51217095016 is 61059071215.

It is an interprime number because it is at equal distance from previous prime (51217094989) and next prime (51217095043).

It can be written as a sum of positive squares in only one way, i.e., 49653208900 + 1563886116 = 222830^2 + 39546^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3201068431 + ... + 3201068446.

Almost surely, 2^51217095016 is an apocalyptic number.

It is an amenable number.

51217095016 is a deficient number, since it is larger than the sum of its proper divisors (44814958154).

51217095016 is a wasteful number, since it uses less digits than its factorization.

51217095016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6402136883 (or 6402136879 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 37.

The spelling of 51217095016 in words is "fifty-one billion, two hundred seventeen million, ninety-five thousand, sixteen".