51391067345 has 8 divisors (see below), whose sum is σ = 61714204776. Its totient is φ = 41082904576.

The previous prime is 51391067339. The next prime is 51391067383. The reversal of 51391067345 is 54376019315.

It can be written as a sum of positive squares in 4 ways, for example, as 27552016144 + 23839051201 = 165988^2 + 154399^2 .

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 51391067345 - 2¹⁴ = 51391050961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51391067296 and 51391067305.

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, 3736112 + ... + 3749841.

It is an arithmetic number, because the mean of its divisors is an integer number (7714275597).

Almost surely, 2^51391067345 is an apocalyptic number.

It is an amenable number.

51391067345 is a deficient number, since it is larger than the sum of its proper divisors (10323137431).

51391067345 is a wasteful number, since it uses less digits than its factorization.

51391067345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7487331.

The product of its (nonzero) digits is 340200, while the sum is 44.

The spelling of 51391067345 in words is "fifty-one billion, three hundred ninety-one million, sixty-seven thousand, three hundred forty-five".