545427166521 has 4 divisors (see below), whose sum is σ = 727236222032. Its totient is φ = 363618111012.

The previous prime is 545427166519. The next prime is 545427166549. The reversal of 545427166521 is 125661724545.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 545427166521 - 2¹ = 545427166519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545427166561) 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, 90904527751 + ... + 90904527756.

It is an arithmetic number, because the mean of its divisors is an integer number (181809055508).

Almost surely, 2^545427166521 is an apocalyptic number.

It is an amenable number.

545427166521 is a deficient number, since it is larger than the sum of its proper divisors (181809055511).

545427166521 is a wasteful number, since it uses less digits than its factorization.

545427166521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181809055510.

The product of its digits is 2016000, while the sum is 48.

The spelling of 545427166521 in words is "five hundred forty-five billion, four hundred twenty-seven million, one hundred sixty-six thousand, five hundred twenty-one".