745357682281 has 9 divisors (see below), whose sum is σ = 786669049341. Its totient is φ = 706112790444.

The previous prime is 745357682263. The next prime is 745357682297. The reversal of 745357682281 is 182286753547.

The square root of 745357682281 is 863341.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 745357682281 - 2²³ = 745349293673 is a prime.

It is a super-2 number, since 2×745357682281² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (745357682261) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 16380760 + ... + 16426198.

It is an arithmetic number, because the mean of its divisors is an integer number (87407672149).

Almost surely, 2^745357682281 is an apocalyptic number.

745357682281 is the 863341-st square number.

745357682281 is the 431671-st centered octagonal number.

It is an amenable number.

745357682281 is a deficient number, since it is larger than the sum of its proper divisors (41311367060).

745357682281 is an frugal number, since it uses more digits than its factorization.

745357682281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90916 (or 45458 counting only the distinct ones).

The product of its digits is 22579200, while the sum is 58.

The spelling of 745357682281 in words is "seven hundred forty-five billion, three hundred fifty-seven million, six hundred eighty-two thousand, two hundred eighty-one".