65537815 has 16 divisors (see below), whose sum is σ = 90227520. Its totient is φ = 44766720.

The previous prime is 65537809. The next prime is 65537819. The reversal of 65537815 is 51873556.

65537815 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 65537815 - 2¹³ = 65529623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65537819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5935 + ... + 12895.

It is an arithmetic number, because the mean of its divisors is an integer number (5639220).

Almost surely, 2^65537815 is an apocalyptic number.

65537815 is a deficient number, since it is larger than the sum of its proper divisors (24689705).

65537815 is a wasteful number, since it uses less digits than its factorization.

65537815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7242.

The product of its digits is 126000, while the sum is 40.

The square root of 65537815 is about 8095.5429095274. The cubic root of 65537815 is about 403.1784578667.

The spelling of 65537815 in words is "sixty-five million, five hundred thirty-seven thousand, eight hundred fifteen".