545045203661 has 4 divisors (see below), whose sum is σ = 622908804192. Its totient is φ = 467181603132.

The previous prime is 545045203631. The next prime is 545045203691. The reversal of 545045203661 is 166302540545.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (545045203631) and next prime (545045203691).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-545045203661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545045203621) 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, 38931800255 + ... + 38931800268.

It is an arithmetic number, because the mean of its divisors is an integer number (155727201048).

Almost surely, 2^545045203661 is an apocalyptic number.

It is an amenable number.

545045203661 is a deficient number, since it is larger than the sum of its proper divisors (77863600531).

545045203661 is an equidigital number, since it uses as much as digits as its factorization.

545045203661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77863600530.

The product of its (nonzero) digits is 432000, while the sum is 41.

The spelling of 545045203661 in words is "five hundred forty-five billion, forty-five million, two hundred three thousand, six hundred sixty-one".