65172001050 has 72 divisors (see below), whose sum is σ = 188564339964. Its totient is φ = 16042337280.

The previous prime is 65172001031. The next prime is 65172001051. The reversal of 65172001050 is 5010027156.

65172001050 is a `hidden beast` number, since 651 + 7 + 2 + 0 + 0 + 1 + 0 + 5 + 0 = 666.

65172001050 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 12574706769 + 52597294281 = 112137^2 + 229341^2 .

It is a super-2 number, since 2×65172001050² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65172001051) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5564407 + ... + 5576106.

Almost surely, 2^65172001050 is an apocalyptic number.

65172001050 is an abundant number, since it is smaller than the sum of its proper divisors (123392338914).

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

65172001050 is a wasteful number, since it uses less digits than its factorization.

65172001050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11140544 (or 11140536 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The spelling of 65172001050 in words is "sixty-five billion, one hundred seventy-two million, one thousand, fifty".