61843812 has 12 divisors (see below), whose sum is σ = 144302256. Its totient is φ = 20614600.

The previous prime is 61843811. The next prime is 61843819. The reversal of 61843812 is 21834816.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (61843811) 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, 2576814 + ... + 2576837.

It is an arithmetic number, because the mean of its divisors is an integer number (12025188).

Almost surely, 2^61843812 is an apocalyptic number.

It is an amenable number.

61843812 is an abundant number, since it is smaller than the sum of its proper divisors (82458444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61843812 is a wasteful number, since it uses less digits than its factorization.

61843812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5153658 (or 5153656 counting only the distinct ones).

The product of its digits is 9216, while the sum is 33.

The square root of 61843812 is about 7864.0836719862. The cubic root of 61843812 is about 395.4565292493.

The spelling of 61843812 in words is "sixty-one million, eight hundred forty-three thousand, eight hundred twelve".