64808613 has 16 divisors (see below), whose sum is σ = 96187840. Its totient is φ = 43126992.

The previous prime is 64808599. The next prime is 64808617. The reversal of 64808613 is 31680846.

It is a happy number.

64808613 is a `hidden beast` number, since 648 + 0 + 8 + 6 + 1 + 3 = 666.

It is not a de Polignac number, because 64808613 - 2⁵ = 64808581 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 (64808617) 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, 15495 + ... + 19227.

It is an arithmetic number, because the mean of its divisors is an integer number (6011740).

Almost surely, 2^64808613 is an apocalyptic number.

It is an amenable number.

64808613 is a deficient number, since it is larger than the sum of its proper divisors (31379227).

64808613 is a wasteful number, since it uses less digits than its factorization.

64808613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4385 (or 4379 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 64808613 is about 8050.3796804871. The cubic root of 64808613 is about 401.6775650202.

The spelling of 64808613 in words is "sixty-four million, eight hundred eight thousand, six hundred thirteen".