64361500 has 144 divisors (see below), whose sum is σ = 170299584. Its totient is φ = 21168000.

The previous prime is 64361491. The next prime is 64361503. The reversal of 64361500 is 516346.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64361503) 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, 906465 + ... + 906535.

It is an arithmetic number, because the mean of its divisors is an integer number (1182636).

Almost surely, 2^64361500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64361500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85149792).

64361500 is an abundant number, since it is smaller than the sum of its proper divisors (105938084).

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

64361500 is a wasteful number, since it uses less digits than its factorization.

64361500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 122 counting only the distinct ones).

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

The square root of 64361500 is about 8022.5619349432. The cubic root of 64361500 is about 400.7517114398.

Adding to 64361500 its reverse (516346), we get a palindrome (64877846).

The spelling of 64361500 in words is "sixty-four million, three hundred sixty-one thousand, five hundred".