51385337409 has 16 divisors (see below), whose sum is σ = 78304783232. Its totient is φ = 29361806208.

The previous prime is 51385337407. The next prime is 51385337429. The reversal of 51385337409 is 90473358315.

51385337409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51385337409 - 2¹ = 51385337407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51385337401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 730197 + ... + 797469.

It is an arithmetic number, because the mean of its divisors is an integer number (4894048952).

Almost surely, 2^51385337409 is an apocalyptic number.

It is an amenable number.

51385337409 is a deficient number, since it is larger than the sum of its proper divisors (26919445823).

51385337409 is a wasteful number, since it uses less digits than its factorization.

51385337409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103656.

The product of its (nonzero) digits is 1360800, while the sum is 48.

The spelling of 51385337409 in words is "fifty-one billion, three hundred eighty-five million, three hundred thirty-seven thousand, four hundred nine".