65319918016 has 28 divisors (see below), whose sum is σ = 129876968592. Its totient is φ = 32595012608.

The previous prime is 65319917987. The next prime is 65319918031. The reversal of 65319918016 is 61081991356.

It is a super-2 number, since 2×65319918016² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 982345 + ... + 1046728.

It is an arithmetic number, because the mean of its divisors is an integer number (4638463164).

Almost surely, 2^65319918016 is an apocalyptic number.

It is an amenable number.

65319918016 is a deficient number, since it is larger than the sum of its proper divisors (64557050576).

65319918016 is a wasteful number, since it uses less digits than its factorization.

65319918016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2029588 (or 2029578 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 49.

The spelling of 65319918016 in words is "sixty-five billion, three hundred nineteen million, nine hundred eighteen thousand, sixteen".