64112819 has 4 divisors (see below), whose sum is σ = 64701120. Its totient is φ = 63524520.

The previous prime is 64112813. The next prime is 64112833. The reversal of 64112819 is 91821146.

64112819 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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64112819 is a prime.

It is a super-5 number, since 5×64112819⁵ (a number of 40 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64112813) 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, 293987 + ... + 294204.

It is an arithmetic number, because the mean of its divisors is an integer number (16175280).

Almost surely, 2^64112819 is an apocalyptic number.

64112819 is a deficient number, since it is larger than the sum of its proper divisors (588301).

64112819 is a wasteful number, since it uses less digits than its factorization.

64112819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588300.

The product of its digits is 3456, while the sum is 32.

The square root of 64112819 is about 8007.0480827831. The cubic root of 64112819 is about 400.2349016094.

The spelling of 64112819 in words is "sixty-four million, one hundred twelve thousand, eight hundred nineteen".