545011861 has 4 divisors (see below), whose sum is σ = 548056800. Its totient is φ = 541966924.

The previous prime is 545011843. The next prime is 545011897. The reversal of 545011861 is 168110545.

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 a cyclic number.

It is not a de Polignac number, because 545011861 - 2⁵ = 545011829 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 (545011661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1522201 + ... + 1522558.

It is an arithmetic number, because the mean of its divisors is an integer number (137014200).

Almost surely, 2^545011861 is an apocalyptic number.

It is an amenable number.

545011861 is a deficient number, since it is larger than the sum of its proper divisors (3044939).

545011861 is a wasteful number, since it uses less digits than its factorization.

545011861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3044938.

The product of its (nonzero) digits is 4800, while the sum is 31.

The square root of 545011861 is about 23345.4890931846. The cubic root of 545011861 is about 816.8368426336.

The spelling of 545011861 in words is "five hundred forty-five million, eleven thousand, eight hundred sixty-one".