64470649 has 4 divisors (see below), whose sum is σ = 64504720. Its totient is φ = 64436580.

The previous prime is 64470641. The next prime is 64470689. The reversal of 64470649 is 94607446.

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.

It is a cyclic number.

It is not a de Polignac number, because 64470649 - 2³ = 64470641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64470641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14019 + ... + 18040.

It is an arithmetic number, because the mean of its divisors is an integer number (16126180).

Almost surely, 2^64470649 is an apocalyptic number.

It is an amenable number.

64470649 is a deficient number, since it is larger than the sum of its proper divisors (34071).

64470649 is a wasteful number, since it uses less digits than its factorization.

64470649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34070.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 64470649 is about 8029.3616807315. The cubic root of 64470649 is about 400.9781249792.

The spelling of 64470649 in words is "sixty-four million, four hundred seventy thousand, six hundred forty-nine".