64716736 has 56 divisors (see below), whose sum is σ = 154513280. Its totient is φ = 26272512.

The previous prime is 64716709. The next prime is 64716749. The reversal of 64716736 is 63761746.

It is a tau number, because it is divible by the number of its divisors (56).

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 7 ways as a sum of consecutive naturals, for example, 4711 + ... + 12313.

Almost surely, 2^64716736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64716736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77256640).

64716736 is an abundant number, since it is smaller than the sum of its proper divisors (89796544).

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

64716736 is a wasteful number, since it uses less digits than its factorization.

64716736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7641 (or 7631 counting only the distinct ones).

The product of its digits is 127008, while the sum is 40.

The square root of 64716736 is about 8044.6712797976. The cubic root of 64716736 is about 401.4876603079.

The spelling of 64716736 in words is "sixty-four million, seven hundred sixteen thousand, seven hundred thirty-six".