5645280769 has 8 divisors (see below), whose sum is σ = 5765241960. Its totient is φ = 5526576000.

The previous prime is 5645280733. The next prime is 5645280791. The reversal of 5645280769 is 9670825465.

It can be written as a sum of positive squares in 4 ways, for example, as 1090650625 + 4554630144 = 33025^2 + 67488^2 .

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 5645280769 - 2²¹ = 5643183617 is a prime.

It is a super-2 number, since 2×5645280769² = 63738389921682462722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5645280269) 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, 305022 + ... + 322999.

It is an arithmetic number, because the mean of its divisors is an integer number (720655245).

Almost surely, 2^5645280769 is an apocalyptic number.

It is an amenable number.

5645280769 is a deficient number, since it is larger than the sum of its proper divisors (119961191).

5645280769 is a wasteful number, since it uses less digits than its factorization.

5645280769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628211.

The product of its (nonzero) digits is 3628800, while the sum is 52.

The square root of 5645280769 is about 75135.0834763628. The cubic root of 5645280769 is about 1780.5814673365.

The spelling of 5645280769 in words is "five billion, six hundred forty-five million, two hundred eighty thousand, seven hundred sixty-nine".