64450200125 has 8 divisors (see below), whose sum is σ = 80433849912. Its totient is φ = 51560160000.

The previous prime is 64450200121. The next prime is 64450200127. The reversal of 64450200125 is 52100205446.

It can be written as a sum of positive squares in 4 ways, for example, as 755040484 + 63695159641 = 27478^2 + 252379^2 .

It is not a de Polignac number, because 64450200125 - 2² = 64450200121 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64450200121) 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 7 ways as a sum of consecutive naturals, for example, 257800676 + ... + 257800925.

It is an arithmetic number, because the mean of its divisors is an integer number (10054231239).

Almost surely, 2^64450200125 is an apocalyptic number.

It is an amenable number.

64450200125 is a deficient number, since it is larger than the sum of its proper divisors (15983649787).

64450200125 is an equidigital number, since it uses as much as digits as its factorization.

64450200125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515601616 (or 515601606 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The spelling of 64450200125 in words is "sixty-four billion, four hundred fifty million, two hundred thousand, one hundred twenty-five".