65503801218172 has 12 divisors (see below), whose sum is σ = 114632077703976. Its totient is φ = 32751779017040.

The previous prime is 65503801218137. The next prime is 65503801218179. The reversal of 65503801218172 is 27181210830556.

It is a super-2 number, since 2×65503801218172² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65503801218179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29180479 + ... + 31344982.

It is an arithmetic number, because the mean of its divisors is an integer number (9552673141998).

Almost surely, 2^{65503801218172} is an apocalyptic number.

It is an amenable number.

65503801218172 is a deficient number, since it is larger than the sum of its proper divisors (49128276485804).

65503801218172 is a wasteful number, since it uses less digits than its factorization.

65503801218172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60796028 (or 60796026 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 49.

The spelling of 65503801218172 in words is "sixty-five trillion, five hundred three billion, eight hundred one million, two hundred eighteen thousand, one hundred seventy-two".