65390530688 has 128 divisors (see below), whose sum is σ = 153269867520. Its totient is φ = 27206194176.

The previous prime is 65390530669. The next prime is 65390530691. The reversal of 65390530688 is 88603509356.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-3 number, since 3×65390530688³ (a number of 33 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6429095 + ... + 6439257.

It is an arithmetic number, because the mean of its divisors is an integer number (1197420840).

Almost surely, 2^65390530688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65390530688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76634933760).

65390530688 is an abundant number, since it is smaller than the sum of its proper divisors (87879336832).

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

65390530688 is a wasteful number, since it uses less digits than its factorization.

65390530688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10394 (or 10382 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 53.

The spelling of 65390530688 in words is "sixty-five billion, three hundred ninety million, five hundred thirty thousand, six hundred eighty-eight".