64987056 has 80 divisors (see below), whose sum is σ = 197532000. Its totient is φ = 20385792.

The previous prime is 64987051. The next prime is 64987079. The reversal of 64987056 is 65078946.

It is not an unprimeable number, because it can be changed into a prime (64987051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2920 + ... + 11768.

It is an arithmetic number, because the mean of its divisors is an integer number (2469150).

Almost surely, 2^64987056 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 64987056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98766000).

64987056 is an abundant number, since it is smaller than the sum of its proper divisors (132544944).

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

64987056 is a wasteful number, since it uses less digits than its factorization.

64987056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8883 (or 8871 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 64987056 is about 8061.4549555276. The cubic root of 64987056 is about 402.0458847157.

The spelling of 64987056 in words is "sixty-four million, nine hundred eighty-seven thousand, fifty-six".