64409212900 has 18 divisors (see below), whose sum is σ = 139767992210. Its totient is φ = 25763685120.

The previous prime is 64409212891. The next prime is 64409212909. The reversal of 64409212900 is 921290446.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (64409212891) and next prime (64409212909).

It can be written as a sum of positive squares in 3 ways, for example, as 17131668544 + 47277544356 = 130888^2 + 217434^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 64409212900.

It is not an unprimeable number, because it can be changed into a prime (64409212909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 322045965 + ... + 322046164.

Almost surely, 2^64409212900 is an apocalyptic number.

It is an amenable number.

64409212900 is an abundant number, since it is smaller than the sum of its proper divisors (75358779310).

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

64409212900 is a wasteful number, since it uses less digits than its factorization.

64409212900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644092143 (or 644092136 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The spelling of 64409212900 in words is "sixty-four billion, four hundred nine million, two hundred twelve thousand, nine hundred".