545742247491 has 20 divisors (see below), whose sum is σ = 931708106032. Its totient is φ = 311852712528.

The previous prime is 545742247399. The next prime is 545742247513. The reversal of 545742247491 is 194742247545.

It is a happy number.

545742247491 is a `hidden beast` number, since 5 + 4 + 574 + 2 + 24 + 7 + 49 + 1 = 666.

It is not a de Polignac number, because 545742247491 - 2¹⁹ = 545741723203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545742247291) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 481253620 + ... + 481254753.

Almost surely, 2^545742247491 is an apocalyptic number.

545742247491 is a deficient number, since it is larger than the sum of its proper divisors (385965858541).

545742247491 is an equidigital number, since it uses as much as digits as its factorization.

545742247491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962508392 (or 962508383 counting only the distinct ones).

The product of its digits is 11289600, while the sum is 54.

Adding to 545742247491 its sum of digits (54), we get a palindrome (545742247545).

The spelling of 545742247491 in words is "five hundred forty-five billion, seven hundred forty-two million, two hundred forty-seven thousand, four hundred ninety-one".