64516369 has 4 divisors (see below), whose sum is σ = 64538596. Its totient is φ = 64494144.

The previous prime is 64516339. The next prime is 64516373. The reversal of 64516369 is 96361546.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34398225 + 30118144 = 5865^2 + 5488^2 .

It is a cyclic number.

It is not a de Polignac number, because 64516369 - 2¹¹ = 64514321 is a prime.

It is a super-2 number, since 2×64516369² = 8324723737888322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64516339) 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, 5964 + ... + 12829.

It is an arithmetic number, because the mean of its divisors is an integer number (16134649).

Almost surely, 2^64516369 is an apocalyptic number.

It is an amenable number.

64516369 is a deficient number, since it is larger than the sum of its proper divisors (22227).

64516369 is a wasteful number, since it uses less digits than its factorization.

64516369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22226.

The product of its digits is 116640, while the sum is 40.

The square root of 64516369 is about 8032.2082268826. The cubic root of 64516369 is about 401.0728884530.

The spelling of 64516369 in words is "sixty-four million, five hundred sixteen thousand, three hundred sixty-nine".