545234404432491 has 10 divisors (see below), whose sum is σ = 814485962177052. Its totient is φ = 363489602954940.

The previous prime is 545234404432451. The next prime is 545234404432493. The reversal of 545234404432491 is 194234404432545.

545234404432491 is a `hidden beast` number, since 5 + 4 + 5 + 234 + 40 + 44 + 324 + 9 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-545234404432491 is a prime.

It is a super-2 number, since 2×545234404432491² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (545234404432493) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3365644471725 + ... + 3365644471886.

Almost surely, 2^{545234404432491} is an apocalyptic number.

545234404432491 is a deficient number, since it is larger than the sum of its proper divisors (269251557744561).

545234404432491 is an equidigital number, since it uses as much as digits as its factorization.

545234404432491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6731288943623 (or 6731288943614 counting only the distinct ones).

The product of its (nonzero) digits is 33177600, while the sum is 54.

Adding to 545234404432491 its sum of digits (54), we get a palindrome (545234404432545).

The spelling of 545234404432491 in words is "five hundred forty-five trillion, two hundred thirty-four billion, four hundred four million, four hundred thirty-two thousand, four hundred ninety-one".