61145161 has 16 divisors (see below), whose sum is σ = 76406400. Its totient is φ = 47537280.

The previous prime is 61145111. The next prime is 61145177. The reversal of 61145161 is 16154116.

It is not a de Polignac number, because 61145161 - 2⁷ = 61145033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61145111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57765 + ... + 58813.

It is an arithmetic number, because the mean of its divisors is an integer number (4775400).

Almost surely, 2^61145161 is an apocalyptic number.

It is an amenable number.

61145161 is a deficient number, since it is larger than the sum of its proper divisors (15261239).

61145161 is a wasteful number, since it uses less digits than its factorization.

61145161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1824.

The product of its digits is 720, while the sum is 25.

The square root of 61145161 is about 7819.5371346391. The cubic root of 61145161 is about 393.9617255201.

Adding to 61145161 its reverse (16154116), we get a palindrome (77299277).

The spelling of 61145161 in words is "sixty-one million, one hundred forty-five thousand, one hundred sixty-one".