64521546 has 16 divisors (see below), whose sum is σ = 129453984. Its totient is φ = 21438704.

The previous prime is 64521539. The next prime is 64521551. The reversal of 64521546 is 64512546.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15060 + ... + 18863.

It is an arithmetic number, because the mean of its divisors is an integer number (8090874).

Almost surely, 2^64521546 is an apocalyptic number.

64521546 is an abundant number, since it is smaller than the sum of its proper divisors (64932438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64521546 is a wasteful number, since it uses less digits than its factorization.

64521546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34245.

The product of its digits is 28800, while the sum is 33.

The square root of 64521546 is about 8032.5304854697. The cubic root of 64521546 is about 401.0836159570.

The spelling of 64521546 in words is "sixty-four million, five hundred twenty-one thousand, five hundred forty-six".