65516539 has 12 divisors (see below), whose sum is σ = 74501280. Its totient is φ = 57503600.

The previous prime is 65516537. The next prime is 65516557. The reversal of 65516539 is 93561556.

It is not a de Polignac number, because 65516539 - 2¹ = 65516537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65516537) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5827 + ... + 12844.

It is an arithmetic number, because the mean of its divisors is an integer number (6208440).

Almost surely, 2^65516539 is an apocalyptic number.

65516539 is a deficient number, since it is larger than the sum of its proper divisors (8984741).

65516539 is a wasteful number, since it uses less digits than its factorization.

65516539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18722 (or 18711 counting only the distinct ones).

The product of its digits is 121500, while the sum is 40.

The square root of 65516539 is about 8094.2287464588. The cubic root of 65516539 is about 403.1348242623.

The spelling of 65516539 in words is "sixty-five million, five hundred sixteen thousand, five hundred thirty-nine".