61072161 has 8 divisors (see below), whose sum is σ = 81475200. Its totient is φ = 40691952.

The previous prime is 61072127. The next prime is 61072181. The reversal of 61072161 is 16127016.

61072161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61072161 - 2⁶ = 61072097 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (61072181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2040 + ... + 11238.

It is an arithmetic number, because the mean of its divisors is an integer number (10184400).

Almost surely, 2^61072161 is an apocalyptic number.

It is an amenable number.

61072161 is a deficient number, since it is larger than the sum of its proper divisors (20403039).

61072161 is a wasteful number, since it uses less digits than its factorization.

61072161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11415.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 61072161 is about 7814.8679451415. The cubic root of 61072161 is about 393.8048820452.

Adding to 61072161 its reverse (16127016), we get a palindrome (77199177).

It can be divided in two parts, 610 and 72161, that added together give a triangular number (72771 = T₃₈₁).

The spelling of 61072161 in words is "sixty-one million, seventy-two thousand, one hundred sixty-one".