5555615161 has 4 divisors (see below), whose sum is σ = 5559162112. Its totient is φ = 5552068212.

The previous prime is 5555615137. The next prime is 5555615189. The reversal of 5555615161 is 1615165555.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1615165555 = 5 ⋅323033111.

It is a cyclic number.

It is not a de Polignac number, because 5555615161 - 2¹⁷ = 5555484089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5555615101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1771125 + ... + 1774258.

It is an arithmetic number, because the mean of its divisors is an integer number (1389790528).

Almost surely, 2^5555615161 is an apocalyptic number.

It is an amenable number.

5555615161 is a deficient number, since it is larger than the sum of its proper divisors (3546951).

5555615161 is a wasteful number, since it uses less digits than its factorization.

5555615161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3546950.

The product of its digits is 112500, while the sum is 40.

The square root of 5555615161 is about 74535.9990943973. Note that the first 3 decimals coincide. The cubic root of 5555615161 is about 1771.1039493053.

The spelling of 5555615161 in words is "five billion, five hundred fifty-five million, six hundred fifteen thousand, one hundred sixty-one".