545422321665 has 48 divisors (see below), whose sum is σ = 1018282316688. Its totient is φ = 268473235968.

The previous prime is 545422321621. The next prime is 545422321687. The reversal of 545422321665 is 566123224545.

545422321665 is a `hidden beast` number, since 5 + 4 + 5 + 422 + 3 + 216 + 6 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 309305047104 + 236117274561 = 556152^2 + 485919^2 .

It is not a de Polignac number, because 545422321665 - 2²² = 545418127361 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 545422321665.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3812407 + ... + 3952883.

It is an arithmetic number, because the mean of its divisors is an integer number (21214214931).

Almost surely, 2^545422321665 is an apocalyptic number.

It is an amenable number.

545422321665 is a deficient number, since it is larger than the sum of its proper divisors (472859995023).

545422321665 is a wasteful number, since it uses less digits than its factorization.

545422321665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147138 (or 147135 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 45.

The spelling of 545422321665 in words is "five hundred forty-five billion, four hundred twenty-two million, three hundred twenty-one thousand, six hundred sixty-five".