545409851 has 4 divisors (see below), whose sum is σ = 623325552. Its totient is φ = 467494152.

The previous prime is 545409817. The next prime is 545409853. The reversal of 545409851 is 158904545.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 158904545 = 5 ⋅31780909.

It is a cyclic number.

It is not a de Polignac number, because 545409851 - 2¹⁰ = 545408827 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 545409799 and 545409808.

It is not an unprimeable number, because it can be changed into a prime (545409853) 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, 38957840 + ... + 38957853.

It is an arithmetic number, because the mean of its divisors is an integer number (155831388).

Almost surely, 2^545409851 is an apocalyptic number.

545409851 is a deficient number, since it is larger than the sum of its proper divisors (77915701).

545409851 is an equidigital number, since it uses as much as digits as its factorization.

545409851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77915700.

The product of its (nonzero) digits is 144000, while the sum is 41.

The square root of 545409851 is about 23354.0114541378. The cubic root of 545409851 is about 817.0356235032.

The spelling of 545409851 in words is "five hundred forty-five million, four hundred nine thousand, eight hundred fifty-one".