61109340 has 24 divisors (see below), whose sum is σ = 171106320. Its totient is φ = 16295808.

The previous prime is 61109333. The next prime is 61109429. The reversal of 61109340 is 4390116.

61109340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 61109340.

It is a congruent number.

It is an unprimeable number.

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, 509185 + ... + 509304.

It is an arithmetic number, because the mean of its divisors is an integer number (7129430).

Almost surely, 2^61109340 is an apocalyptic number.

61109340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61109340 is an abundant number, since it is smaller than the sum of its proper divisors (109996980).

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

61109340 is a wasteful number, since it uses less digits than its factorization.

61109340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018501 (or 1018499 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 61109340 is about 7817.2463182376. The cubic root of 61109340 is about 393.8847782500.

Adding to 61109340 its reverse (4390116), we get a palindrome (65499456).

The spelling of 61109340 in words is "sixty-one million, one hundred nine thousand, three hundred forty".