545797481778 has 12 divisors (see below), whose sum is σ = 1182561210558. Its totient is φ = 181932493920.

The previous prime is 545797481759. The next prime is 545797481783. The reversal of 545797481778 is 877184797545.

545797481778 is a `hidden beast` number, since 5 + 4 + 5 + 79 + 7 + 481 + 7 + 78 = 666.

It can be written as a sum of positive squares in only one way, i.e., 387502515009 + 158294966769 = 622497^2 + 397863^2 .

It is a super-2 number, since 2×545797481778² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15161041143 + ... + 15161041178.

Almost surely, 2^545797481778 is an apocalyptic number.

545797481778 is an abundant number, since it is smaller than the sum of its proper divisors (636763728780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

545797481778 is a wasteful number, since it uses less digits than its factorization.

545797481778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30322082329 (or 30322082326 counting only the distinct ones).

The product of its digits is 553190400, while the sum is 72.

It can be divided in two parts, 54579 and 7481778, that added together give a palindrome (7536357).

The spelling of 545797481778 in words is "five hundred forty-five billion, seven hundred ninety-seven million, four hundred eighty-one thousand, seven hundred seventy-eight".