65509725287 has 4 divisors (see below), whose sum is σ = 65510336640. Its totient is φ = 65509113936.

The previous prime is 65509725283. The next prime is 65509725289. The reversal of 65509725287 is 78252790556.

It is a happy number.

65509725287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 65509725287 - 2² = 65509725283 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 (65509725283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97838 + ... + 374955.

It is an arithmetic number, because the mean of its divisors is an integer number (16377584160).

Almost surely, 2^65509725287 is an apocalyptic number.

65509725287 is a deficient number, since it is larger than the sum of its proper divisors (611353).

65509725287 is a wasteful number, since it uses less digits than its factorization.

65509725287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611352.

The product of its (nonzero) digits is 10584000, while the sum is 56.

The spelling of 65509725287 in words is "sixty-five billion, five hundred nine million, seven hundred twenty-five thousand, two hundred eighty-seven".