65172845 has 16 divisors (see below), whose sum is σ = 80015040. Its totient is φ = 50947584.

The previous prime is 65172841. The next prime is 65172847. The reversal of 65172845 is 54827156.

It is a cyclic number.

It is not a de Polignac number, because 65172845 - 2² = 65172841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65172799 and 65172808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65172841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39446 + ... + 41064.

It is an arithmetic number, because the mean of its divisors is an integer number (5000940).

Almost surely, 2^65172845 is an apocalyptic number.

It is an amenable number.

65172845 is a deficient number, since it is larger than the sum of its proper divisors (14842195).

65172845 is a wasteful number, since it uses less digits than its factorization.

65172845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804.

The product of its digits is 67200, while the sum is 38.

The square root of 65172845 is about 8072.9700234796. The cubic root of 65172845 is about 402.4286513708.

The spelling of 65172845 in words is "sixty-five million, one hundred seventy-two thousand, eight hundred forty-five".