64111823 has 4 divisors (see below), whose sum is σ = 65675568. Its totient is φ = 62548080.

The previous prime is 64111799. The next prime is 64111843. The reversal of 64111823 is 32811146.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32811146 = 2 ⋅16405573.

It is a cyclic number.

It is not a de Polignac number, because 64111823 - 2²⁴ = 47334607 is a prime.

It is a super-2 number, since 2×64111823² = 8220651696766658, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64111792 and 64111801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64111843) 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, 781811 + ... + 781892.

It is an arithmetic number, because the mean of its divisors is an integer number (16418892).

Almost surely, 2^64111823 is an apocalyptic number.

64111823 is a deficient number, since it is larger than the sum of its proper divisors (1563745).

64111823 is a wasteful number, since it uses less digits than its factorization.

64111823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1563744.

The product of its digits is 1152, while the sum is 26.

The square root of 64111823 is about 8006.9858873361. The cubic root of 64111823 is about 400.2328290336.

Adding to 64111823 its reverse (32811146), we get a palindrome (96922969).

The spelling of 64111823 in words is "sixty-four million, one hundred eleven thousand, eight hundred twenty-three".