64470451 has 4 divisors (see below), whose sum is σ = 66693600. Its totient is φ = 62247304.

The previous prime is 64470437. The next prime is 64470487. The reversal of 64470451 is 15407446.

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

It is a cyclic number.

It is not a de Polignac number, because 64470451 - 2⁹ = 64469939 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64470431) 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, 1111531 + ... + 1111588.

It is an arithmetic number, because the mean of its divisors is an integer number (16673400).

Almost surely, 2^64470451 is an apocalyptic number.

64470451 is a deficient number, since it is larger than the sum of its proper divisors (2223149).

64470451 is a wasteful number, since it uses less digits than its factorization.

64470451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2223148.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 64470451 is about 8029.3493509748. The cubic root of 64470451 is about 400.9777144888.

Adding to 64470451 its reverse (15407446), we get a palindrome (79877897).

The spelling of 64470451 in words is "sixty-four million, four hundred seventy thousand, four hundred fifty-one".