61803720 has 96 divisors (see below), whose sum is σ = 219136320. Its totient is φ = 14981760.

The previous prime is 61803719. The next prime is 61803743. The reversal of 61803720 is 2730816.

61803720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 23 ways as a sum of consecutive naturals, for example, 3844 + ... + 11763.

It is an arithmetic number, because the mean of its divisors is an integer number (2282670).

Almost surely, 2^61803720 is an apocalyptic number.

61803720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61803720 is an abundant number, since it is smaller than the sum of its proper divisors (157332600).

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

61803720 is a wasteful number, since it uses less digits than its factorization.

61803720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15635 (or 15628 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 61803720 is about 7861.5342014139. The cubic root of 61803720 is about 395.3710554837.

The spelling of 61803720 in words is "sixty-one million, eight hundred three thousand, seven hundred twenty".