652218615945 has 64 divisors (see below), whose sum is σ = 1249986608640. Its totient is φ = 320759357184.

The previous prime is 652218615911. The next prime is 652218615947. The reversal of 652218615945 is 549516812256.

652218615945 is a `hidden beast` number, since 6 + 5 + 2 + 2 + 18 + 615 + 9 + 4 + 5 = 666.

It is not a de Polignac number, because 652218615945 - 2¹⁶ = 652218550409 is a prime.

It is a super-2 number, since 2×652218615945² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 652218615891 and 652218615900.

It is not an unprimeable number, because it can be changed into a prime (652218615947) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1504927 + ... + 1889243.

It is an arithmetic number, because the mean of its divisors is an integer number (19531040760).

Almost surely, 2^652218615945 is an apocalyptic number.

652218615945 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

652218615945 is a deficient number, since it is larger than the sum of its proper divisors (597767992695).

652218615945 is a wasteful number, since it uses less digits than its factorization.

652218615945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385311 (or 385305 counting only the distinct ones).

The product of its digits is 5184000, while the sum is 54.

The spelling of 652218615945 in words is "six hundred fifty-two billion, two hundred eighteen million, six hundred fifteen thousand, nine hundred forty-five".