64869441800 has 24 divisors (see below), whose sum is σ = 150821452650. Its totient is φ = 25947776640.

The previous prime is 64869441797. The next prime is 64869441827. The reversal of 64869441800 is 814496846.

It can be written as a sum of positive squares in 3 ways, for example, as 34396153444 + 30473288356 = 185462^2 + 174566^2 .

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is an unprimeable number.

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, 162173405 + ... + 162173804.

Almost surely, 2^64869441800 is an apocalyptic number.

It is an amenable number.

64869441800 is an abundant number, since it is smaller than the sum of its proper divisors (85952010850).

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

64869441800 is a wasteful number, since it uses less digits than its factorization.

64869441800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324347225 (or 324347216 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 50.

The spelling of 64869441800 in words is "sixty-four billion, eight hundred sixty-nine million, four hundred forty-one thousand, eight hundred".