545103245521 has 4 divisors (see below), whose sum is σ = 548114865844. Its totient is φ = 542091625200.

The previous prime is 545103245501. The next prime is 545103245567. The reversal of 545103245521 is 125542301545.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42296035600 + 502807209921 = 205660^2 + 709089^2 .

It is a cyclic number.

It is not a de Polignac number, because 545103245521 - 2¹¹ = 545103243473 is a prime.

It is a super-2 number, since 2×545103245521² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545103245501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1505809890 + ... + 1505810251.

It is an arithmetic number, because the mean of its divisors is an integer number (137028716461).

Almost surely, 2^545103245521 is an apocalyptic number.

It is an amenable number.

545103245521 is a deficient number, since it is larger than the sum of its proper divisors (3011620323).

545103245521 is a wasteful number, since it uses less digits than its factorization.

545103245521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3011620322.

The product of its (nonzero) digits is 120000, while the sum is 37.

The spelling of 545103245521 in words is "five hundred forty-five billion, one hundred three million, two hundred forty-five thousand, five hundred twenty-one".