65091968 has 16 divisors (see below), whose sum is σ = 129675660. Its totient is φ = 32545920.

The previous prime is 65091959. The next prime is 65091973. The reversal of 65091968 is 86919056.

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×65091968² = 8473928596226048, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 254138 + ... + 254393.

Almost surely, 2^65091968 is an apocalyptic number.

It is an amenable number.

65091968 is a deficient number, since it is larger than the sum of its proper divisors (64583692).

65091968 is an equidigital number, since it uses as much as digits as its factorization.

65091968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508545 (or 508533 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 65091968 is about 8067.9593454603. The cubic root of 65091968 is about 402.2621162921.

The spelling of 65091968 in words is "sixty-five million, ninety-one thousand, nine hundred sixty-eight".