51655001165 has 8 divisors (see below), whose sum is σ = 61987281048. Its totient is φ = 41323147840.

The previous prime is 51655001081. The next prime is 51655001219. The reversal of 51655001165 is 56110055615.

It can be written as a sum of positive squares in 4 ways, for example, as 3443577124 + 48211424041 = 58682^2 + 219571^2 .

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

It is not a de Polignac number, because 51655001165 - 2¹⁴ = 51654984781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302459 + ... + 441351.

It is an arithmetic number, because the mean of its divisors is an integer number (7748410131).

Almost surely, 2^51655001165 is an apocalyptic number.

It is an amenable number.

51655001165 is a deficient number, since it is larger than the sum of its proper divisors (10332279883).

51655001165 is a wasteful number, since it uses less digits than its factorization.

51655001165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213279.

The product of its (nonzero) digits is 22500, while the sum is 35.

The spelling of 51655001165 in words is "fifty-one billion, six hundred fifty-five million, one thousand, one hundred sixty-five".