645577753169 has 8 divisors (see below), whose sum is σ = 650938455552. Its totient is φ = 640239066720.

The previous prime is 645577753111. The next prime is 645577753189. The reversal of 645577753169 is 961357775546.

645577753169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 645577753169 - 2²⁰ = 645576704593 is a prime.

It is a super-3 number, since 3×645577753169³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645577753189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5445092 + ... + 5562389.

It is an arithmetic number, because the mean of its divisors is an integer number (81367306944).

Almost surely, 2^645577753169 is an apocalyptic number.

It is an amenable number.

645577753169 is a deficient number, since it is larger than the sum of its proper divisors (5360702383).

645577753169 is a wasteful number, since it uses less digits than its factorization.

645577753169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11007967.

The product of its digits is 166698000, while the sum is 65.

The spelling of 645577753169 in words is "six hundred forty-five billion, five hundred seventy-seven million, seven hundred fifty-three thousand, one hundred sixty-nine".