65319917988 has 24 divisors (see below), whose sum is σ = 164137230208. Its totient is φ = 20098436256.

The previous prime is 65319917987. The next prime is 65319918031. The reversal of 65319917988 is 88971991356.

It is not an unprimeable number, because it can be changed into a prime (65319917987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209358556 + ... + 209358867.

Almost surely, 2^65319917988 is an apocalyptic number.

It is an amenable number.

65319917988 is an abundant number, since it is smaller than the sum of its proper divisors (98817312220).

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

65319917988 is a wasteful number, since it uses less digits than its factorization.

65319917988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418717443 (or 418717441 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 66.

The spelling of 65319917988 in words is "sixty-five billion, three hundred nineteen million, nine hundred seventeen thousand, nine hundred eighty-eight".