545816618545 has 72 divisors (see below), whose sum is σ = 757988366184. Its totient is φ = 376883020800.

The previous prime is 545816618539. The next prime is 545816618591.

545816618545 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 226935046129 + 318881572416 = 476377^2 + 564696^2 .

It is not a de Polignac number, because 545816618545 - 2¹⁵ = 545816585777 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 545816618545.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 30805609 + ... + 30823321.

It is an arithmetic number, because the mean of its divisors is an integer number (10527616197).

Almost surely, 2^545816618545 is an apocalyptic number.

545816618545 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

545816618545 is a deficient number, since it is larger than the sum of its proper divisors (212171747639).

545816618545 is a wasteful number, since it uses less digits than its factorization.

545816618545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17855 (or 17813 counting only the distinct ones).

The product of its digits is 23040000, while the sum is 58.

The spelling of 545816618545 in words is "five hundred forty-five billion, eight hundred sixteen million, six hundred eighteen thousand, five hundred forty-five".