445123215157 has 2 divisors, whose sum is σ = 445123215158. Its totient is φ = 445123215156.

The previous prime is 445123215143. The next prime is 445123215181. The reversal of 445123215157 is 751512321544.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 397657621201 + 47465593956 = 630601^2 + 217866^2 .

It is a cyclic number.

It is not a de Polignac number, because 445123215157 - 2²³ = 445114826549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445123215127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222561607578 + 222561607579.

It is an arithmetic number, because the mean of its divisors is an integer number (222561607579).

Almost surely, 2^445123215157 is an apocalyptic number.

It is an amenable number.

445123215157 is a deficient number, since it is larger than the sum of its proper divisors (1).

445123215157 is an equidigital number, since it uses as much as digits as its factorization.

445123215157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 168000, while the sum is 40.

The spelling of 445123215157 in words is "four hundred forty-five billion, one hundred twenty-three million, two hundred fifteen thousand, one hundred fifty-seven".