64963960 has 64 divisors (see below), whose sum is σ = 153679680. Its totient is φ = 24668160.

The previous prime is 64963949. The next prime is 64963981. The reversal of 64963960 is 6936946.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221574 + ... + 221866.

It is an arithmetic number, because the mean of its divisors is an integer number (2401245).

Almost surely, 2^64963960 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 64963960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76839840).

64963960 is an abundant number, since it is smaller than the sum of its proper divisors (88715720).

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

64963960 is a wasteful number, since it uses less digits than its factorization.

64963960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568 (or 564 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 43.

The square root of 64963960 is about 8060.0223324753. The cubic root of 64963960 is about 401.9982508608.

The spelling of 64963960 in words is "sixty-four million, nine hundred sixty-three thousand, nine hundred sixty".