675745644 has 72 divisors (see below), whose sum is σ = 1833841408. Its totient is φ = 189715680.

The previous prime is 675745643. The next prime is 675745669. The reversal of 675745644 is 446547576.

It is a junction number, because it is equal to n+sod(n) for n = 675745593 and 675745602.

It is not an unprimeable number, because it can be changed into a prime (675745643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 291249 + ... + 293559.

Almost surely, 2^675745644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 675745644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (916920704).

675745644 is an abundant number, since it is smaller than the sum of its proper divisors (1158095764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

675745644 is a wasteful number, since it uses less digits than its factorization.

675745644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2443 (or 2382 counting only the distinct ones).

The product of its digits is 2822400, while the sum is 48.

The square root of 675745644 is about 25995.1080782520. The cubic root of 675745644 is about 877.5282064942.

The spelling of 675745644 in words is "six hundred seventy-five million, seven hundred forty-five thousand, six hundred forty-four".