64549900 has 18 divisors (see below), whose sum is σ = 140073500. Its totient is φ = 25819920.

The previous prime is 64549871. The next prime is 64549907. The reversal of 64549900 is 994546.

64549900 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 64549900.

It is not an unprimeable number, because it can be changed into a prime (64549907) 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 5 ways as a sum of consecutive naturals, for example, 322650 + ... + 322849.

Almost surely, 2^64549900 is an apocalyptic number.

It is an amenable number.

64549900 is an abundant number, since it is smaller than the sum of its proper divisors (75523600).

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

64549900 is a wasteful number, since it uses less digits than its factorization.

64549900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645513 (or 645506 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 64549900 is about 8034.2952397830. The cubic root of 64549900 is about 401.1423594316.

The spelling of 64549900 in words is "sixty-four million, five hundred forty-nine thousand, nine hundred".