64537332 has 12 divisors (see below), whose sum is σ = 150587136. Its totient is φ = 21512440.

The previous prime is 64537309. The next prime is 64537339. The reversal of 64537332 is 23373546.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 64537293 and 64537302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64537339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2689044 + ... + 2689067.

It is an arithmetic number, because the mean of its divisors is an integer number (12548928).

Almost surely, 2^64537332 is an apocalyptic number.

It is an amenable number.

64537332 is an abundant number, since it is smaller than the sum of its proper divisors (86049804).

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

64537332 is a wasteful number, since it uses less digits than its factorization.

64537332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5378118 (or 5378116 counting only the distinct ones).

The product of its digits is 45360, while the sum is 33.

The square root of 64537332 is about 8033.5130546978. The cubic root of 64537332 is about 401.1163233241.

The spelling of 64537332 in words is "sixty-four million, five hundred thirty-seven thousand, three hundred thirty-two".