64511123 has 4 divisors (see below), whose sum is σ = 65728368. Its totient is φ = 63293880.

The previous prime is 64511101. The next prime is 64511129. The reversal of 64511123 is 32111546.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32111546 = 2 ⋅16055773.

It is a cyclic number.

It is not a de Polignac number, because 64511123 - 2⁶ = 64511059 is a prime.

It is a super-2 number, since 2×64511123² = 8323369981442258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64511129) 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, 608543 + ... + 608648.

It is an arithmetic number, because the mean of its divisors is an integer number (16432092).

Almost surely, 2^64511123 is an apocalyptic number.

64511123 is a deficient number, since it is larger than the sum of its proper divisors (1217245).

64511123 is a wasteful number, since it uses less digits than its factorization.

64511123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217244.

The product of its digits is 720, while the sum is 23.

The square root of 64511123 is about 8031.8816599848. The cubic root of 64511123 is about 401.0620173855.

Adding to 64511123 its reverse (32111546), we get a palindrome (96622669).

The spelling of 64511123 in words is "sixty-four million, five hundred eleven thousand, one hundred twenty-three".