64538111 has 4 divisors (see below), whose sum is σ = 70405224. Its totient is φ = 58671000.

The previous prime is 64538093. The next prime is 64538119. The reversal of 64538111 is 11183546.

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 64538111 - 2¹⁰ = 64537087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64538119) 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, 2933540 + ... + 2933561.

It is an arithmetic number, because the mean of its divisors is an integer number (17601306).

Almost surely, 2^64538111 is an apocalyptic number.

64538111 is a deficient number, since it is larger than the sum of its proper divisors (5867113).

64538111 is a wasteful number, since it uses less digits than its factorization.

64538111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5867112.

The product of its digits is 2880, while the sum is 29.

The square root of 64538111 is about 8033.5615389440. The cubic root of 64538111 is about 401.1179372135.

The spelling of 64538111 in words is "sixty-four million, five hundred thirty-eight thousand, one hundred eleven".