64613563 has 8 divisors (see below), whose sum is σ = 75561728. Its totient is φ = 54094824.

The previous prime is 64613551. The next prime is 64613569. The reversal of 64613563 is 36531646.

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

It is not a de Polignac number, because 64613563 - 2¹³ = 64605371 is a prime.

It is a super-3 number, since 3×64613563³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64613569) 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, 107031 + ... + 107632.

It is an arithmetic number, because the mean of its divisors is an integer number (9445216).

Almost surely, 2^64613563 is an apocalyptic number.

64613563 is a deficient number, since it is larger than the sum of its proper divisors (10948165).

64613563 is a wasteful number, since it uses less digits than its factorization.

64613563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214713.

The product of its digits is 38880, while the sum is 34.

The square root of 64613563 is about 8038.2562163693. The cubic root of 64613563 is about 401.2741930205.

The spelling of 64613563 in words is "sixty-four million, six hundred thirteen thousand, five hundred sixty-three".