51056556105169 has 8 divisors (see below), whose sum is σ = 52337488641480. Its totient is φ = 49791340532736.

The previous prime is 51056556105109. The next prime is 51056556105173. The reversal of 51056556105169 is 96150165565015.

It can be written as a sum of positive squares in 4 ways, for example, as 1529826769 + 51055026278400 = 39113^2 + 7145280^2 .

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 51056556105169 - 2¹⁷ = 51056555974097 is a prime.

It is a super-2 number, since 2×51056556105169² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51056556105109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3929234392 + ... + 3929247385.

It is an arithmetic number, because the mean of its divisors is an integer number (6542186080185).

Almost surely, 2^{51056556105169} is an apocalyptic number.

It is an amenable number.

51056556105169 is a deficient number, since it is larger than the sum of its proper divisors (1280932536311).

51056556105169 is an equidigital number, since it uses as much as digits as its factorization.

51056556105169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7858481939.

The product of its (nonzero) digits is 6075000, while the sum is 55.

The spelling of 51056556105169 in words is "fifty-one trillion, fifty-six billion, five hundred fifty-six million, one hundred five thousand, one hundred sixty-nine".