745550885381 has 2 divisors, whose sum is σ = 745550885382. Its totient is φ = 745550885380.

The previous prime is 745550885357. The next prime is 745550885389. The reversal of 745550885381 is 183588055547.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 468252804100 + 277298081281 = 684290^2 + 526591^2 .

It is a cyclic number.

It is not a de Polignac number, because 745550885381 - 2¹⁰ = 745550884357 is a prime.

It is a super-2 number, since 2×745550885381² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 745550885381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (745550885389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372775442690 + 372775442691.

It is an arithmetic number, because the mean of its divisors is an integer number (372775442691).

Almost surely, 2^745550885381 is an apocalyptic number.

It is an amenable number.

745550885381 is a deficient number, since it is larger than the sum of its proper divisors (1).

745550885381 is an equidigital number, since it uses as much as digits as its factorization.

745550885381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880000, while the sum is 59.

The spelling of 745550885381 in words is "seven hundred forty-five billion, five hundred fifty million, eight hundred eighty-five thousand, three hundred eighty-one".