64542525 has 24 divisors (see below), whose sum is σ = 112329120. Its totient is φ = 32610240.

The previous prime is 64542509. The next prime is 64542551. The reversal of 64542525 is 52524546.

It is not a de Polignac number, because 64542525 - 2⁴ = 64542509 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 21222 + ... + 24071.

It is an arithmetic number, because the mean of its divisors is an integer number (4680380).

Almost surely, 2^64542525 is an apocalyptic number.

It is an amenable number.

64542525 is a deficient number, since it is larger than the sum of its proper divisors (47786595).

64542525 is a wasteful number, since it uses less digits than its factorization.

64542525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45325 (or 45320 counting only the distinct ones).

The product of its digits is 48000, while the sum is 33.

The square root of 64542525 is about 8033.8362567331. The cubic root of 64542525 is about 401.1270816512.

The spelling of 64542525 in words is "sixty-four million, five hundred forty-two thousand, five hundred twenty-five".