51678717165309 has 8 divisors (see below), whose sum is σ = 74205337468192. Its totient is φ = 31802287486320.

The previous prime is 51678717165301. The next prime is 51678717165323. The reversal of 51678717165309 is 90356171787615.

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

It is not a de Polignac number, because 51678717165309 - 2³ = 51678717165301 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 51678717165309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51678717165301) 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, 662547655927 + ... + 662547656004.

It is an arithmetic number, because the mean of its divisors is an integer number (9275667183524).

Almost surely, 2^{51678717165309} is an apocalyptic number.

It is an amenable number.

51678717165309 is a deficient number, since it is larger than the sum of its proper divisors (22526620302883).

51678717165309 is a wasteful number, since it uses less digits than its factorization.

51678717165309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325095311947.

The product of its (nonzero) digits is 66679200, while the sum is 66.

The spelling of 51678717165309 in words is "fifty-one trillion, six hundred seventy-eight billion, seven hundred seventeen million, one hundred sixty-five thousand, three hundred nine".