64863811 has 4 divisors (see below), whose sum is σ = 66956224. Its totient is φ = 62771400.

The previous prime is 64863809. The next prime is 64863817. The reversal of 64863811 is 11836846.

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 64863811 - 2¹ = 64863809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64863817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1046160 + ... + 1046221.

It is an arithmetic number, because the mean of its divisors is an integer number (16739056).

Almost surely, 2^64863811 is an apocalyptic number.

64863811 is a deficient number, since it is larger than the sum of its proper divisors (2092413).

64863811 is a wasteful number, since it uses less digits than its factorization.

64863811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2092412.

The product of its digits is 27648, while the sum is 37.

The square root of 64863811 is about 8053.8072363324. The cubic root of 64863811 is about 401.7915699626.

The spelling of 64863811 in words is "sixty-four million, eight hundred sixty-three thousand, eight hundred eleven".