545496243051321 has 27 divisors (see below), whose sum is σ = 788867890975983. Its totient is φ = 363235955678640.

The previous prime is 545496243051313. The next prime is 545496243051337. The reversal of 545496243051321 is 123150342694545.

The square root of 545496243051321 is 23355861.

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

545496243051321 is a `hidden beast` number, since 5 + 4 + 5 + 4 + 9 + 6 + 2 + 4 + 305 + 1 + 321 = 666.

It can be written as a sum of positive squares in only one way, i.e., 513853593018921 + 31642650032400 = 22668339^2 + 5625180^2 .

It is not a de Polignac number, because 545496243051321 - 2³ = 545496243051313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (545496243051301) 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, 66353996991 + ... + 66354005211.

Almost surely, 2^{545496243051321} is an apocalyptic number.

545496243051321 is the 23355861-st square number.

545496243051321 is the 11677931-st centered octagonal number.

It is an amenable number.

545496243051321 is a deficient number, since it is larger than the sum of its proper divisors (243371647924662).

545496243051321 is an frugal number, since it uses more digits than its factorization.

545496243051321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18342 (or 9171 counting only the distinct ones).

The product of its (nonzero) digits is 15552000, while the sum is 54.

The spelling of 545496243051321 in words is "five hundred forty-five trillion, four hundred ninety-six billion, two hundred forty-three million, fifty-one thousand, three hundred twenty-one".