64616500 has 48 divisors (see below), whose sum is σ = 151993296. Its totient is φ = 23856000.

The previous prime is 64616479. The next prime is 64616501. The reversal of 64616500 is 561646.

It can be written as a sum of positive squares in 8 ways, for example, as 55532304 + 9084196 = 7452^2 + 3014^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64616501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1530 + ... + 11470.

It is an arithmetic number, because the mean of its divisors is an integer number (3166527).

Almost surely, 2^64616500 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 64616500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75996648).

64616500 is an abundant number, since it is smaller than the sum of its proper divisors (87376796).

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

64616500 is a wasteful number, since it uses less digits than its factorization.

64616500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9973 (or 9961 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 64616500 is about 8038.4389031702. The cubic root of 64616500 is about 401.2802728815.

The spelling of 64616500 in words is "sixty-four million, six hundred sixteen thousand, five hundred".