65129540709 has 16 divisors (see below), whose sum is σ = 89219470400. Its totient is φ = 42230522880.

The previous prime is 65129540689. The next prime is 65129540711. The reversal of 65129540709 is 90704592156.

65129540709 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 65129540709 - 2¹⁷ = 65129409637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65129540209) 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, 195717 + ... + 410565.

It is an arithmetic number, because the mean of its divisors is an integer number (5576216900).

Almost surely, 2^65129540709 is an apocalyptic number.

It is an amenable number.

65129540709 is a deficient number, since it is larger than the sum of its proper divisors (24089929691).

65129540709 is a wasteful number, since it uses less digits than its factorization.

65129540709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217620.

The product of its (nonzero) digits is 680400, while the sum is 48.

The spelling of 65129540709 in words is "sixty-five billion, one hundred twenty-nine million, five hundred forty thousand, seven hundred nine".