4445826813 has 6 divisors (see below), whose sum is σ = 6421749854. Its totient is φ = 2963884536.

The previous prime is 4445826761. The next prime is 4445826829. The reversal of 4445826813 is 3186285444.

4445826813 is a `hidden beast` number, since 4 + 4 + 4 + 582 + 68 + 1 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2675268729 + 1770558084 = 51723^2 + 42078^2 .

It is not a de Polignac number, because 4445826813 - 2²² = 4441632509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4445826863) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 246990370 + ... + 246990387.

Almost surely, 2^4445826813 is an apocalyptic number.

It is an amenable number.

4445826813 is a deficient number, since it is larger than the sum of its proper divisors (1975923041).

4445826813 is a wasteful number, since it uses less digits than its factorization.

4445826813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493980763 (or 493980760 counting only the distinct ones).

The product of its digits is 737280, while the sum is 45.

The square root of 4445826813 is about 66677.0336247797. The cubic root of 4445826813 is about 1644.3118259182.

The spelling of 4445826813 in words is "four billion, four hundred forty-five million, eight hundred twenty-six thousand, eight hundred thirteen".