64165563 has 48 divisors (see below), whose sum is σ = 117801216. Its totient is φ = 32685120.

The previous prime is 64165559. The next prime is 64165573. The reversal of 64165563 is 36556146.

64165563 is a `hidden beast` number, since 641 + 6 + 5 + 5 + 6 + 3 = 666.

It is not a de Polignac number, because 64165563 - 2² = 64165559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64165553) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35856 + ... + 37602.

It is an arithmetic number, because the mean of its divisors is an integer number (2454192).

Almost surely, 2^64165563 is an apocalyptic number.

64165563 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

64165563 is a deficient number, since it is larger than the sum of its proper divisors (53635653).

64165563 is a wasteful number, since it uses less digits than its factorization.

64165563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824 (or 1821 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 64165563 is about 8010.3410039773. The cubic root of 64165563 is about 400.3446259138.

The spelling of 64165563 in words is "sixty-four million, one hundred sixty-five thousand, five hundred sixty-three".