745544175601 has 27 divisors (see below), whose sum is σ = 769652119947. Its totient is φ = 722188743600.

The previous prime is 745544175587. The next prime is 745544175619. The reversal of 745544175601 is 106571445547.

The square root of 745544175601 is 863449.

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

It can be written as a sum of positive squares in only one way, i.e., 716310015201 + 29234160400 = 846351^2 + 170980^2 .

It is not a de Polignac number, because 745544175601 - 2¹³ = 745544167409 is a prime.

It is a super-2 number, since 2×745544175601² (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 (745544175661) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 7238292916 + ... + 7238293018.

Almost surely, 2^745544175601 is an apocalyptic number.

745544175601 is the 863449-th square number.

745544175601 is the 431725-th centered octagonal number.

It is an amenable number.

745544175601 is a deficient number, since it is larger than the sum of its proper divisors (24107944346).

745544175601 is an frugal number, since it uses more digits than its factorization.

745544175601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 2352000, while the sum is 49.

Multiplying 745544175601 by its sum of digits (49), we get a square (36531664604449 = 6044143²).

The spelling of 745544175601 in words is "seven hundred forty-five billion, five hundred forty-four million, one hundred seventy-five thousand, six hundred one".