5545021815369 has 15 divisors (see below), whose sum is σ = 8283335852253. Its totient is φ = 3696667081524.

The previous prime is 5545021815317. The next prime is 5545021815407. The reversal of 5545021815369 is 9635181205455.

The square root of 5545021815369 is 2354787.

It is a perfect power (a square), and thus also a powerful number.

5545021815369 is a `hidden beast` number, since 5 + 5 + 4 + 5 + 0 + 21 + 81 + 536 + 9 = 666.

It is not a de Polignac number, because 5545021815369 - 2¹⁷ = 5545021684297 is a prime.

It is a super-2 number, since 2×5545021815369² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5545021715369) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 21062262 + ... + 21323904.

Almost surely, 2^{5545021815369} is an apocalyptic number.

5545021815369 is the 2354787-th square number.

5545021815369 is the 1177394-th centered octagonal number.

It is an amenable number.

5545021815369 is a deficient number, since it is larger than the sum of its proper divisors (2738314036884).

5545021815369 is an frugal number, since it uses more digits than its factorization.

5545021815369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523298 (or 261646 counting only the distinct ones).

The product of its (nonzero) digits is 6480000, while the sum is 54.

The spelling of 5545021815369 in words is "five trillion, five hundred forty-five billion, twenty-one million, eight hundred fifteen thousand, three hundred sixty-nine".