65139303168 has 432 divisors, whose sum is σ = 207312618240. Its totient is φ = 20353462272.

The previous prime is 65139303107. The next prime is 65139303209. The reversal of 65139303168 is 86130393156.

It is a tau number, because it is divible by the number of its divisors (432).

It is a super-2 number, since 2×65139303168² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 75831123 + ... + 75831981.

It is an arithmetic number, because the mean of its divisors is an integer number (479890320).

Almost surely, 2^65139303168 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 65139303168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103656309120).

65139303168 is an abundant number, since it is smaller than the sum of its proper divisors (142173315072).

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

65139303168 is an equidigital number, since it uses as much as digits as its factorization.

65139303168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966 (or 940 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 65139303168 in words is "sixty-five billion, one hundred thirty-nine million, three hundred three thousand, one hundred sixty-eight".