64163500 has 24 divisors (see below), whose sum is σ = 140134176. Its totient is φ = 25665200.

The previous prime is 64163497. The next prime is 64163501. The reversal of 64163500 is 536146.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (64163501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63664 + ... + 64663.

It is an arithmetic number, because the mean of its divisors is an integer number (5838924).

Almost surely, 2^64163500 is an apocalyptic number.

It is an amenable number.

64163500 is an abundant number, since it is smaller than the sum of its proper divisors (75970676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64163500 is a wasteful number, since it uses less digits than its factorization.

64163500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128346 (or 128334 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 64163500 is about 8010.2122318950. The cubic root of 64163500 is about 400.3403353475.

Adding to 64163500 its reverse (536146), we get a palindrome (64699646).

The spelling of 64163500 in words is "sixty-four million, one hundred sixty-three thousand, five hundred".