65625280 has 56 divisors (see below), whose sum is σ = 178600608. Its totient is φ = 22499328.

The previous prime is 65625269. The next prime is 65625299. The reversal of 65625280 is 8252656.

65625280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12409 + ... + 16888.

Almost surely, 2^65625280 is an apocalyptic number.

It is an amenable number.

65625280 is an abundant number, since it is smaller than the sum of its proper divisors (112975328).

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

65625280 is a wasteful number, since it uses less digits than its factorization.

65625280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29321 (or 29311 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 65625280 is about 8100.9431549666. The cubic root of 65625280 is about 403.3577351688.

The spelling of 65625280 in words is "sixty-five million, six hundred twenty-five thousand, two hundred eighty".