545969186921 has 8 divisors (see below), whose sum is σ = 546301574280. Its totient is φ = 545636869888.

The previous prime is 545969186911. The next prime is 545969186929. The reversal of 545969186921 is 129681969545.

It can be written as a sum of positive squares in 4 ways, for example, as 48492884521 + 497476302400 = 220211^2 + 705320^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 545969186921 - 2¹⁰ = 545969185897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545969186929) 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, 27708545 + ... + 27728241.

It is an arithmetic number, because the mean of its divisors is an integer number (68287696785).

Almost surely, 2^545969186921 is an apocalyptic number.

It is an amenable number.

545969186921 is a deficient number, since it is larger than the sum of its proper divisors (332387359).

545969186921 is a wasteful number, since it uses less digits than its factorization.

545969186921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35163.

The product of its digits is 41990400, while the sum is 65.

The spelling of 545969186921 in words is "five hundred forty-five billion, nine hundred sixty-nine million, one hundred eighty-six thousand, nine hundred twenty-one".