64601513 has 8 divisors (see below), whose sum is σ = 68517000. Its totient is φ = 60698880.

The previous prime is 64601507. The next prime is 64601521. The reversal of 64601513 is 31510646.

It can be written as a sum of positive squares in 4 ways, for example, as 8456464 + 56145049 = 2908^2 + 7493^2 .

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 64601513 - 2²⁴ = 47824297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64601573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8363 + ... + 14111.

It is an arithmetic number, because the mean of its divisors is an integer number (8564625).

Almost surely, 2^64601513 is an apocalyptic number.

It is an amenable number.

64601513 is a deficient number, since it is larger than the sum of its proper divisors (3915487).

64601513 is a wasteful number, since it uses less digits than its factorization.

64601513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6427.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 64601513 is about 8037.5066407438. The cubic root of 64601513 is about 401.2492464798.

The spelling of 64601513 in words is "sixty-four million, six hundred one thousand, five hundred thirteen".