64872811 has 4 divisors (see below), whose sum is σ = 67693392. Its totient is φ = 62052232.

The previous prime is 64872809. The next prime is 64872823. The reversal of 64872811 is 11827846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11827846 = 2 ⋅5913923.

It is a cyclic number.

It is not a de Polignac number, because 64872811 - 2¹ = 64872809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64872851) 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, 1410256 + ... + 1410301.

It is an arithmetic number, because the mean of its divisors is an integer number (16923348).

Almost surely, 2^64872811 is an apocalyptic number.

64872811 is a deficient number, since it is larger than the sum of its proper divisors (2820581).

64872811 is a wasteful number, since it uses less digits than its factorization.

64872811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2820580.

The product of its digits is 21504, while the sum is 37.

The square root of 64872811 is about 8054.3659589070. The cubic root of 64872811 is about 401.8101522652.

The spelling of 64872811 in words is "sixty-four million, eight hundred seventy-two thousand, eight hundred eleven".