64562609 has 4 divisors (see below), whose sum is σ = 65071104. Its totient is φ = 64054116.

The previous prime is 64562599. The next prime is 64562621. The reversal of 64562609 is 90626546.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90626546 = 2 ⋅45313273.

It is a cyclic number.

It is not a de Polignac number, because 64562609 - 2⁸ = 64562353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64532609) 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, 254057 + ... + 254310.

It is an arithmetic number, because the mean of its divisors is an integer number (16267776).

Almost surely, 2^64562609 is an apocalyptic number.

It is an amenable number.

64562609 is a deficient number, since it is larger than the sum of its proper divisors (508495).

64562609 is a wasteful number, since it uses less digits than its factorization.

64562609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508494.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 64562609 is about 8035.0861227494. The cubic root of 64562609 is about 401.1686842010.

The spelling of 64562609 in words is "sixty-four million, five hundred sixty-two thousand, six hundred nine".