61686200 has 48 divisors (see below), whose sum is σ = 151865280. Its totient is φ = 23221760.

The previous prime is 61686193. The next prime is 61686227. The reversal of 61686200 is 268616.

61686200 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 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 11 ways as a sum of consecutive naturals, for example, 5672 + ... + 12471.

It is an arithmetic number, because the mean of its divisors is an integer number (3163860).

Almost surely, 2^61686200 is an apocalyptic number.

It is an amenable number.

61686200 is an abundant number, since it is smaller than the sum of its proper divisors (90179080).

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

61686200 is a wasteful number, since it uses less digits than its factorization.

61686200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18176 (or 18167 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 61686200 is about 7854.0562768547. The cubic root of 61686200 is about 395.1202966400.

The spelling of 61686200 in words is "sixty-one million, six hundred eighty-six thousand, two hundred".