745330443581 has 2 divisors, whose sum is σ = 745330443582. Its totient is φ = 745330443580.

The previous prime is 745330443553. The next prime is 745330443617. The reversal of 745330443581 is 185344033547.

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., 576976968100 + 168353475481 = 759590^2 + 410309^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-745330443581 is a prime.

It is a super-2 number, since 2×745330443581² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (745330403581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372665221790 + 372665221791.

It is an arithmetic number, because the mean of its divisors is an integer number (372665221791).

Almost surely, 2^745330443581 is an apocalyptic number.

It is an amenable number.

745330443581 is a deficient number, since it is larger than the sum of its proper divisors (1).

745330443581 is an equidigital number, since it uses as much as digits as its factorization.

745330443581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2419200, while the sum is 47.

The spelling of 745330443581 in words is "seven hundred forty-five billion, three hundred thirty million, four hundred forty-three thousand, five hundred eighty-one".