64501400 has 96 divisors (see below), whose sum is σ = 161909280. Its totient is φ = 23808000.

The previous prime is 64501391. The next prime is 64501403. The reversal of 64501400 is 410546.

It is a happy number.

64501400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64501403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 207245 + ... + 207555.

It is an arithmetic number, because the mean of its divisors is an integer number (1686555).

Almost surely, 2^64501400 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 64501400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80954640).

64501400 is an abundant number, since it is smaller than the sum of its proper divisors (97407880).

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

64501400 is a wasteful number, since it uses less digits than its factorization.

64501400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405 (or 396 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 64501400 is about 8031.2763618244. The cubic root of 64501400 is about 401.0418672588.

Adding to 64501400 its reverse (410546), we get a palindrome (64911946).

The spelling of 64501400 in words is "sixty-four million, five hundred one thousand, four hundred".