65145252172 has 96 divisors (see below), whose sum is σ = 153231482880. Its totient is φ = 23403928320.

The previous prime is 65145252163. The next prime is 65145252209. The reversal of 65145252172 is 27125254156.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3983829 + ... + 4000147.

It is an arithmetic number, because the mean of its divisors is an integer number (1596161280).

Almost surely, 2^65145252172 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 65145252172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76615741440).

65145252172 is an abundant number, since it is smaller than the sum of its proper divisors (88086230708).

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

65145252172 is a wasteful number, since it uses less digits than its factorization.

65145252172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17351 (or 17349 counting only the distinct ones).

The product of its digits is 168000, while the sum is 40.

The spelling of 65145252172 in words is "sixty-five billion, one hundred forty-five million, two hundred fifty-two thousand, one hundred seventy-two".