545909581439 has 4 divisors (see below), whose sum is σ = 569644780656. Its totient is φ = 522174382224.

The previous prime is 545909581429. The next prime is 545909581487. The reversal of 545909581439 is 934185909545.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-545909581439 is a prime.

It is a super-2 number, since 2×545909581439² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545909581409) 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, 11867599574 + ... + 11867599619.

It is an arithmetic number, because the mean of its divisors is an integer number (142411195164).

Almost surely, 2^545909581439 is an apocalyptic number.

545909581439 is a deficient number, since it is larger than the sum of its proper divisors (23735199217).

545909581439 is a wasteful number, since it uses less digits than its factorization.

545909581439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23735199216.

The product of its (nonzero) digits is 34992000, while the sum is 62.

The spelling of 545909581439 in words is "five hundred forty-five billion, nine hundred nine million, five hundred eighty-one thousand, four hundred thirty-nine".