64263505 has 4 divisors (see below), whose sum is σ = 77116212. Its totient is φ = 51410800.

The previous prime is 64263503. The next prime is 64263509. The reversal of 64263505 is 50536246.

64263505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50536246 = 2 ⋅25268123.

It can be written as a sum of positive squares in 2 ways, for example, as 36469521 + 27793984 = 6039^2 + 5272^2 .

It is not a de Polignac number, because 64263505 - 2¹ = 64263503 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 (64263503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6426346 + ... + 6426355.

It is an arithmetic number, because the mean of its divisors is an integer number (19279053).

Almost surely, 2^64263505 is an apocalyptic number.

It is an amenable number.

64263505 is a deficient number, since it is larger than the sum of its proper divisors (12852707).

64263505 is a wasteful number, since it uses less digits than its factorization.

64263505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12852706.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 64263505 is about 8016.4521454319. The cubic root of 64263505 is about 400.5482170519.

The spelling of 64263505 in words is "sixty-four million, two hundred sixty-three thousand, five hundred five".