45055581169 has 9 divisors (see below), whose sum is σ = 45299507659. Its totient is φ = 44812964560.

The previous prime is 45055581161. The next prime is 45055581173. The reversal of 45055581169 is 96118555054.

The square root of 45055581169 is 212263.

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

It can be written as a sum of positive squares in only one way, i.e., 9149879025 + 35905702144 = 95655^2 + 189488^2 .

It is not a de Polignac number, because 45055581169 - 2³ = 45055581161 is a prime.

It is a super-2 number, since 2×45055581169² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45055581161) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 49456824 + ... + 49457734.

Almost surely, 2^45055581169 is an apocalyptic number.

45055581169 is the 212263-rd square number.

45055581169 is the 106132-nd centered octagonal number.

It is an amenable number.

45055581169 is a deficient number, since it is larger than the sum of its proper divisors (243926490).

45055581169 is an frugal number, since it uses more digits than its factorization.

45055581169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2288 (or 1144 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 49.

Multiplying 45055581169 by its sum of digits (49), we get a square (2207723477281 = 1485841²).

The spelling of 45055581169 in words is "forty-five billion, fifty-five million, five hundred eighty-one thousand, one hundred sixty-nine".