545529621 has 16 divisors (see below), whose sum is σ = 895228544. Its totient is φ = 287751744.

The previous prime is 545529619. The next prime is 545529659. The reversal of 545529621 is 126925545.

It is not a de Polignac number, because 545529621 - 2¹ = 545529619 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 545529621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545529601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 998866 + ... + 999411.

It is an arithmetic number, because the mean of its divisors is an integer number (55951784).

Almost surely, 2^545529621 is an apocalyptic number.

It is an amenable number.

545529621 is a deficient number, since it is larger than the sum of its proper divisors (349698923).

545529621 is a wasteful number, since it uses less digits than its factorization.

545529621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998300.

The product of its digits is 108000, while the sum is 39.

The square root of 545529621 is about 23356.5755409478. The cubic root of 545529621 is about 817.0954251333.

The spelling of 545529621 in words is "five hundred forty-five million, five hundred twenty-nine thousand, six hundred twenty-one".