545338791 has 32 divisors (see below), whose sum is σ = 832619520. Its totient is φ = 352582272.

The previous prime is 545338789. The next prime is 545338813. The reversal of 545338791 is 197833545.

545338791 is a `hidden beast` number, since 545 + 3 + 38 + 79 + 1 = 666.

It is not a de Polignac number, because 545338791 - 2¹ = 545338789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545338691) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 141496 + ... + 145298.

It is an arithmetic number, because the mean of its divisors is an integer number (26019360).

Almost surely, 2^545338791 is an apocalyptic number.

545338791 is a deficient number, since it is larger than the sum of its proper divisors (287280729).

545338791 is a wasteful number, since it uses less digits than its factorization.

545338791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3972 (or 3966 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 545338791 is about 23352.4900385376. The cubic root of 545338791 is about 817.0001388287. Note that the first 3 decimals are identical.

It can be divided in two parts, 5453 and 38791, that added together give a palindrome (44244).

The spelling of 545338791 in words is "five hundred forty-five million, three hundred thirty-eight thousand, seven hundred ninety-one".