65931648 has 32 divisors (see below), whose sum is σ = 175131960. Its totient is φ = 21977088.

The previous prime is 65931641. The next prime is 65931683. The reversal of 65931648 is 84613956.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65931641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85465 + ... + 86232.

Almost surely, 2^65931648 is an apocalyptic number.

It is an amenable number.

65931648 is an abundant number, since it is smaller than the sum of its proper divisors (109200312).

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

65931648 is a wasteful number, since it uses less digits than its factorization.

65931648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171714 (or 171702 counting only the distinct ones).

The product of its digits is 155520, while the sum is 42.

The square root of 65931648 is about 8119.8305401037. The cubic root of 65931648 is about 403.9844453705.

The spelling of 65931648 in words is "sixty-five million, nine hundred thirty-one thousand, six hundred forty-eight".