61107816 has 128 divisors (see below), whose sum is σ = 195148800. Its totient is φ = 15482880.

The previous prime is 61107811. The next prime is 61107817. The reversal of 61107816 is 61870116.

It is a happy number.

61107816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (61107811) 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 31 ways as a sum of consecutive naturals, for example, 79080 + ... + 79848.

It is an arithmetic number, because the mean of its divisors is an integer number (1524600).

Almost surely, 2^61107816 is an apocalyptic number.

61107816 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61107816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97574400).

61107816 is an abundant number, since it is smaller than the sum of its proper divisors (134040984).

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

61107816 is a wasteful number, since it uses less digits than its factorization.

61107816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839 (or 835 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 61107816 is about 7817.1488408498. The cubic root of 61107816 is about 393.8815038711.

The spelling of 61107816 in words is "sixty-one million, one hundred seven thousand, eight hundred sixteen".