545404231553 has 4 divisors (see below), whose sum is σ = 558706773828. Its totient is φ = 532101689280.

The previous prime is 545404231523. The next prime is 545404231609. The reversal of 545404231553 is 355132404545.

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

It can be written as a sum of positive squares in 2 ways, for example, as 74612015104 + 470792216449 = 273152^2 + 686143^2 .

It is a cyclic number.

It is not a de Polignac number, because 545404231553 - 2¹⁰ = 545404230529 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 13302542233 = 545404231553 / (5 + 4 + 5 + 4 + 0 + 4 + 2 + 3 + 1 + 5 + 5 + 3).

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 545404231553.

It is not an unprimeable number, because it can be changed into a prime (545404231523) 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, 6651271076 + ... + 6651271157.

It is an arithmetic number, because the mean of its divisors is an integer number (139676693457).

Almost surely, 2^545404231553 is an apocalyptic number.

It is an amenable number.

545404231553 is a deficient number, since it is larger than the sum of its proper divisors (13302542275).

545404231553 is a wasteful number, since it uses less digits than its factorization.

545404231553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13302542274.

The product of its (nonzero) digits is 720000, while the sum is 41.

The spelling of 545404231553 in words is "five hundred forty-five billion, four hundred four million, two hundred thirty-one thousand, five hundred fifty-three".