64506545 has 8 divisors (see below), whose sum is σ = 77605224. Its totient is φ = 51473664.

The previous prime is 64506511. The next prime is 64506557. The reversal of 64506545 is 54560546.

64506545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 19562929 + 44943616 = 4423^2 + 6704^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64506545 - 2⁸ = 64506289 is a prime.

It is a super-2 number, since 2×64506545² = 8322188695674050, which contains 22 as substring.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 14264 + ... + 18233.

It is an arithmetic number, because the mean of its divisors is an integer number (9700653).

Almost surely, 2^64506545 is an apocalyptic number.

It is an amenable number.

64506545 is a deficient number, since it is larger than the sum of its proper divisors (13098679).

64506545 is a wasteful number, since it uses less digits than its factorization.

64506545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32899.

The product of its (nonzero) digits is 72000, while the sum is 35.

The square root of 64506545 is about 8031.5966656699. The cubic root of 64506545 is about 401.0525301051.

The spelling of 64506545 in words is "sixty-four million, five hundred six thousand, five hundred forty-five".