51179520065 has 8 divisors (see below), whose sum is σ = 61417467648. Its totient is φ = 40942253680.

The previous prime is 51179520061. The next prime is 51179520083. The reversal of 51179520065 is 56002597115.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51179520065 - 2² = 51179520061 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51179520061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12914 + ... + 320196.

It is an arithmetic number, because the mean of its divisors is an integer number (7677183456).

Almost surely, 2^51179520065 is an apocalyptic number.

It is an amenable number.

51179520065 is a deficient number, since it is larger than the sum of its proper divisors (10237947583).

51179520065 is a wasteful number, since it uses less digits than its factorization.

51179520065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340599.

The product of its (nonzero) digits is 94500, while the sum is 41.

The spelling of 51179520065 in words is "fifty-one billion, one hundred seventy-nine million, five hundred twenty thousand, sixty-five".