51171056658 has 24 divisors (see below), whose sum is σ = 111096447696. Its totient is φ = 17022276600.

The previous prime is 51171056653. The next prime is 51171056683. The reversal of 51171056658 is 85665017115.

It is a happy number.

51171056658 is a `hidden beast` number, since 5 + 11 + 71 + 0 + 566 + 5 + 8 = 666.

It is a super-3 number, since 3×51171056658³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51171056653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2886108 + ... + 2903783.

It is an arithmetic number, because the mean of its divisors is an integer number (4629018654).

Almost surely, 2^51171056658 is an apocalyptic number.

51171056658 is an abundant number, since it is smaller than the sum of its proper divisors (59925391038).

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

51171056658 is a wasteful number, since it uses less digits than its factorization.

51171056658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5790390 (or 5790387 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 45.

The spelling of 51171056658 in words is "fifty-one billion, one hundred seventy-one million, fifty-six thousand, six hundred fifty-eight".