61099860 has 48 divisors (see below), whose sum is σ = 172065600. Its totient is φ = 16199424.

The previous prime is 61099769. The next prime is 61099867. The reversal of 61099860 is 6899016.

61099860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61099867) 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 15 ways as a sum of consecutive naturals, for example, 7896 + ... + 13584.

It is an arithmetic number, because the mean of its divisors is an integer number (3584700).

Almost surely, 2^61099860 is an apocalyptic number.

61099860 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61099860 is an abundant number, since it is smaller than the sum of its proper divisors (110965740).

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

61099860 is a wasteful number, since it uses less digits than its factorization.

61099860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5880 (or 5878 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 61099860 is about 7816.6399430958. The cubic root of 61099860 is about 393.8644091825.

The spelling of 61099860 in words is "sixty-one million, ninety-nine thousand, eight hundred sixty".