65856513 has 8 divisors (see below), whose sum is σ = 88586208. Its totient is φ = 43515584.

The previous prime is 65856503. The next prime is 65856517. The reversal of 65856513 is 31565856.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65856513 - 2⁵ = 65856481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65856517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96795 + ... + 97472.

It is an arithmetic number, because the mean of its divisors is an integer number (11073276).

Almost surely, 2^65856513 is an apocalyptic number.

It is an amenable number.

65856513 is a deficient number, since it is larger than the sum of its proper divisors (22729695).

65856513 is a wasteful number, since it uses less digits than its factorization.

65856513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194383.

The product of its digits is 108000, while the sum is 39.

The square root of 65856513 is about 8115.2025852717. The cubic root of 65856513 is about 403.8309282577.

The spelling of 65856513 in words is "sixty-five million, eight hundred fifty-six thousand, five hundred thirteen".