64539402 has 16 divisors (see below), whose sum is σ = 129276000. Its totient is φ = 21480272.

The previous prime is 64539401. The next prime is 64539407. The reversal of 64539402 is 20493546.

64539402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (64539401) by changing a digit.

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, 3777 + ... + 11972.

It is an arithmetic number, because the mean of its divisors is an integer number (8079750).

Almost surely, 2^64539402 is an apocalyptic number.

64539402 is an abundant number, since it is smaller than the sum of its proper divisors (64736598).

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

64539402 is a wasteful number, since it uses less digits than its factorization.

64539402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16437.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 64539402 is about 8033.6418889567. The cubic root of 64539402 is about 401.1206118079.

The spelling of 64539402 in words is "sixty-four million, five hundred thirty-nine thousand, four hundred two".