5405661169 has 4 divisors (see below), whose sum is σ = 5479711396. Its totient is φ = 5331610944.

The previous prime is 5405661143. The next prime is 5405661199. The reversal of 5405661169 is 9611665045.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9611665045 = 5 ⋅1922333009.

It can be written as a sum of positive squares in 2 ways, for example, as 3684490000 + 1721171169 = 60700^2 + 41487^2 .

It is a cyclic number.

It is not a de Polignac number, because 5405661169 - 2⁵ = 5405661137 is a prime.

It is a super-2 number, since 2×5405661169² = 58442345348068893122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5405661199) 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, 37025004 + ... + 37025149.

It is an arithmetic number, because the mean of its divisors is an integer number (1369927849).

Almost surely, 2^5405661169 is an apocalyptic number.

It is an amenable number.

5405661169 is a deficient number, since it is larger than the sum of its proper divisors (74050227).

5405661169 is an equidigital number, since it uses as much as digits as its factorization.

5405661169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74050226.

The product of its (nonzero) digits is 194400, while the sum is 43.

The square root of 5405661169 is about 73523.2015693006. The cubic root of 5405661169 is about 1755.0235161607.

The spelling of 5405661169 in words is "five billion, four hundred five million, six hundred sixty-one thousand, one hundred sixty-nine".