51871167168 has 28 divisors (see below), whose sum is σ = 137242463640. Its totient is φ = 17290388992.

The previous prime is 51871167137. The next prime is 51871167199. The reversal of 51871167168 is 86176117815.

It is an interprime number because it is at equal distance from previous prime (51871167137) and next prime (51871167199).

It is a super-2 number, since 2×51871167168² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51871167168.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135080973 + ... + 135081356.

Almost surely, 2^51871167168 is an apocalyptic number.

It is an amenable number.

51871167168 is an abundant number, since it is smaller than the sum of its proper divisors (85371296472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51871167168 is a wasteful number, since it uses less digits than its factorization.

51871167168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270162344 (or 270162334 counting only the distinct ones).

The product of its digits is 564480, while the sum is 51.

The spelling of 51871167168 in words is "fifty-one billion, eight hundred seventy-one million, one hundred sixty-seven thousand, one hundred sixty-eight".