61082861 has 6 divisors (see below), whose sum is σ = 71055630. Its totient is φ = 52356696.

The previous prime is 61082849. The next prime is 61082863. The reversal of 61082861 is 16828016.

61082861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 60918025 + 164836 = 7805^2 + 406^2 .

It is not a de Polignac number, because 61082861 - 2⁶ = 61082797 is a prime.

It is a super-2 number, since 2×61082861² = 7462231815890642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61082863) 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 5 ways as a sum of consecutive naturals, for example, 623246 + ... + 623343.

It is an arithmetic number, because the mean of its divisors is an integer number (11842605).

Almost surely, 2^61082861 is an apocalyptic number.

It is an amenable number.

61082861 is a deficient number, since it is larger than the sum of its proper divisors (9972769).

61082861 is a wasteful number, since it uses less digits than its factorization.

61082861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246603 (or 1246596 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 61082861 is about 7815.5525076606. The cubic root of 61082861 is about 393.8278792456.

The spelling of 61082861 in words is "sixty-one million, eighty-two thousand, eight hundred sixty-one".