545690621 has 8 divisors (see below), whose sum is σ = 656470080. Its totient is φ = 443117088.

The previous prime is 545690573. The next prime is 545690623. The reversal of 545690621 is 126096545.

545690621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 545690621 - 2⁶ = 545690557 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545690623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2051336 + ... + 2051601.

It is an arithmetic number, because the mean of its divisors is an integer number (82058760).

Almost surely, 2^545690621 is an apocalyptic number.

It is an amenable number.

545690621 is a deficient number, since it is larger than the sum of its proper divisors (110779459).

545690621 is a wasteful number, since it uses less digits than its factorization.

545690621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4102963.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 545690621 is about 23360.0218535857. The cubic root of 545690621 is about 817.1757992743.

The spelling of 545690621 in words is "five hundred forty-five million, six hundred ninety thousand, six hundred twenty-one".