64735645 has 16 divisors (see below), whose sum is σ = 84435120. Its totient is φ = 47361024.

The previous prime is 64735621. The next prime is 64735669. The reversal of 64735645 is 54653746.

It is an interprime number because it is at equal distance from previous prime (64735621) and next prime (64735669).

It can be written as a sum of positive squares in 8 ways, for example, as 15202201 + 49533444 = 3899^2 + 7038^2 .

It is a cyclic number.

It is not a de Polignac number, because 64735645 - 2²³ = 56347037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64735598 and 64735607.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2517 + ... + 11653.

It is an arithmetic number, because the mean of its divisors is an integer number (5277195).

Almost surely, 2^64735645 is an apocalyptic number.

64735645 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64735645 is a deficient number, since it is larger than the sum of its proper divisors (19699475).

64735645 is a wasteful number, since it uses less digits than its factorization.

64735645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9264.

The product of its digits is 302400, while the sum is 40.

The square root of 64735645 is about 8045.8464439734. The cubic root of 64735645 is about 401.5267588542.

The spelling of 64735645 in words is "sixty-four million, seven hundred thirty-five thousand, six hundred forty-five".