51605114017 has 8 divisors (see below), whose sum is σ = 52256330280. Its totient is φ = 50957130240.

The previous prime is 51605113979. The next prime is 51605114021. The reversal of 51605114017 is 71041150615.

It can be written as a sum of positive squares in 4 ways, for example, as 42858936576 + 8746177441 = 207024^2 + 93521^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 51605114017 - 2¹⁵ = 51605081249 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51605114017.

It is not an unprimeable number, because it can be changed into a prime (51605114117) 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, 775984 + ... + 839857.

It is an arithmetic number, because the mean of its divisors is an integer number (6532041285).

Almost surely, 2^51605114017 is an apocalyptic number.

It is an amenable number.

51605114017 is a deficient number, since it is larger than the sum of its proper divisors (651216263).

51605114017 is a wasteful number, since it uses less digits than its factorization.

51605114017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1616243.

The product of its (nonzero) digits is 4200, while the sum is 31.

The spelling of 51605114017 in words is "fifty-one billion, six hundred five million, one hundred fourteen thousand, seventeen".