64200645 has 24 divisors (see below), whose sum is σ = 111960576. Its totient is φ = 34031328.

The previous prime is 64200641. The next prime is 64200691. The reversal of 64200645 is 54600246.

It is a happy number.

It is not a de Polignac number, because 64200645 - 2² = 64200641 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64200641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3244 + ... + 11786.

It is an arithmetic number, because the mean of its divisors is an integer number (4665024).

Almost surely, 2^64200645 is an apocalyptic number.

It is an amenable number.

64200645 is a deficient number, since it is larger than the sum of its proper divisors (47759931).

64200645 is a wasteful number, since it uses less digits than its factorization.

64200645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8721 (or 8718 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 64200645 is about 8012.5304991619. The cubic root of 64200645 is about 400.4175743441.

It can be divided in two parts, 6 and 4200645, that added together give a triangular number (4200651 = T₂₈₉₈).

The spelling of 64200645 in words is "sixty-four million, two hundred thousand, six hundred forty-five".