645553027417 has 8 divisors (see below), whose sum is σ = 666386652672. Its totient is φ = 624719985600.

The previous prime is 645553027397. The next prime is 645553027481. The reversal of 645553027417 is 714720355546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 645553027417 - 2¹⁵ = 645552994649 is a prime.

It is a super-2 number, since 2×645553027417² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645553021417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3782868 + ... + 3949834.

It is an arithmetic number, because the mean of its divisors is an integer number (83298331584).

Almost surely, 2^645553027417 is an apocalyptic number.

It is an amenable number.

645553027417 is a deficient number, since it is larger than the sum of its proper divisors (20833625255).

645553027417 is a wasteful number, since it uses less digits than its factorization.

645553027417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291719.

The product of its (nonzero) digits is 3528000, while the sum is 49.

The spelling of 645553027417 in words is "six hundred forty-five billion, five hundred fifty-three million, twenty-seven thousand, four hundred seventeen".