64132736 has 16 divisors (see below), whose sum is σ = 127764690. Its totient is φ = 32066304.

The previous prime is 64132723. The next prime is 64132741. The reversal of 64132736 is 63723146.

It can be written as a sum of positive squares in only one way, i.e., 36675136 + 27457600 = 6056^2 + 5240^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×64132736² = 8226015653691392, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250391 + ... + 250646.

Almost surely, 2^64132736 is an apocalyptic number.

It is an amenable number.

64132736 is a deficient number, since it is larger than the sum of its proper divisors (63631954).

64132736 is an equidigital number, since it uses as much as digits as its factorization.

64132736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501051 (or 501039 counting only the distinct ones).

The product of its digits is 18144, while the sum is 32.

The square root of 64132736 is about 8008.2917029789. The cubic root of 64132736 is about 400.2763423766.

The spelling of 64132736 in words is "sixty-four million, one hundred thirty-two thousand, seven hundred thirty-six".