4445688857 has 2 divisors, whose sum is σ = 4445688858. Its totient is φ = 4445688856.

The previous prime is 4445688839. The next prime is 4445688899. The reversal of 4445688857 is 7588865444.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4279253056 + 166435801 = 65416^2 + 12901^2 .

It is a cyclic number.

It is not a de Polignac number, because 4445688857 - 2³² = 150721561 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4445688796 and 4445688805.

It is not a weakly prime, because it can be changed into another prime (4445688817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2222844428 + 2222844429.

It is an arithmetic number, because the mean of its divisors is an integer number (2222844429).

Almost surely, 2^4445688857 is an apocalyptic number.

It is an amenable number.

4445688857 is a deficient number, since it is larger than the sum of its proper divisors (1).

4445688857 is an equidigital number, since it uses as much as digits as its factorization.

4445688857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34406400, while the sum is 59.

The square root of 4445688857 is about 66675.9991076249. Note that the first 3 decimals coincide. The cubic root of 4445688857 is about 1644.2948178311.

The spelling of 4445688857 in words is "four billion, four hundred forty-five million, six hundred eighty-eight thousand, eight hundred fifty-seven".