64464277 has 4 divisors (see below), whose sum is σ = 64608300. Its totient is φ = 64320256.

The previous prime is 64464269. The next prime is 64464293. The reversal of 64464277 is 77246446.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77246446 = 2 ⋅38623223.

It can be written as a sum of positive squares in 2 ways, for example, as 52911076 + 11553201 = 7274^2 + 3399^2 .

It is a cyclic number.

It is not a de Polignac number, because 64464277 - 2³ = 64464269 is a prime.

It is a Smith number, since the sum of its digits (40) 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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64464217) 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, 71338 + ... + 72235.

It is an arithmetic number, because the mean of its divisors is an integer number (16152075).

Almost surely, 2^64464277 is an apocalyptic number.

It is an amenable number.

64464277 is a deficient number, since it is larger than the sum of its proper divisors (144023).

64464277 is a wasteful number, since it uses less digits than its factorization.

64464277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144022.

The product of its digits is 225792, while the sum is 40.

The square root of 64464277 is about 8028.9648772429. The cubic root of 64464277 is about 400.9649142297.

The spelling of 64464277 in words is "sixty-four million, four hundred sixty-four thousand, two hundred seventy-seven".