745270051676581 has 2 divisors, whose sum is σ = 745270051676582. Its totient is φ = 745270051676580.

The previous prime is 745270051676413. The next prime is 745270051676593. The reversal of 745270051676581 is 185676150072547.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 704932183212481 + 40337868464100 = 26550559^2 + 6351210^2 .

It is an emirp because it is prime and its reverse (185676150072547) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 745270051676581 - 2¹⁹ = 745270051152293 is a prime.

It is a super-2 number, since 2×745270051676581² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (745270051676681) 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, 372635025838290 + 372635025838291.

It is an arithmetic number, because the mean of its divisors is an integer number (372635025838291).

Almost surely, 2^{745270051676581} is an apocalyptic number.

It is an amenable number.

745270051676581 is a deficient number, since it is larger than the sum of its proper divisors (1).

745270051676581 is an equidigital number, since it uses as much as digits as its factorization.

745270051676581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 98784000, while the sum is 64.

The spelling of 745270051676581 in words is "seven hundred forty-five trillion, two hundred seventy billion, fifty-one million, six hundred seventy-six thousand, five hundred eighty-one".