64813601 has 4 divisors (see below), whose sum is σ = 65066052. Its totient is φ = 64561152.

The previous prime is 64813559. The next prime is 64813631. The reversal of 64813601 is 10631846.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 62094400 + 2719201 = 7880^2 + 1649^2 .

It is a cyclic number.

It is not a de Polignac number, because 64813601 - 2¹⁸ = 64551457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64813631) 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, 125840 + ... + 126353.

It is an arithmetic number, because the mean of its divisors is an integer number (16266513).

Almost surely, 2^64813601 is an apocalyptic number.

It is an amenable number.

64813601 is a deficient number, since it is larger than the sum of its proper divisors (252451).

64813601 is a wasteful number, since it uses less digits than its factorization.

64813601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252450.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 64813601 is about 8050.6894735793. The cubic root of 64813601 is about 401.6878698043.

The spelling of 64813601 in words is "sixty-four million, eight hundred thirteen thousand, six hundred one".