64977264 has 240 divisors, whose sum is σ = 222842880. Its totient is φ = 17418240.

The previous prime is 64977259. The next prime is 64977287. The reversal of 64977264 is 46277946.

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 47 ways as a sum of consecutive naturals, for example, 511569 + ... + 511695.

It is an arithmetic number, because the mean of its divisors is an integer number (928512).

Almost surely, 2^64977264 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 64977264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111421440).

64977264 is an abundant number, since it is smaller than the sum of its proper divisors (157865616).

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

64977264 is a wasteful number, since it uses less digits than its factorization.

64977264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188 (or 179 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 64977264 is about 8060.8475981127. The cubic root of 64977264 is about 402.0256907915.

The spelling of 64977264 in words is "sixty-four million, nine hundred seventy-seven thousand, two hundred sixty-four".