61686050 has 12 divisors (see below), whose sum is σ = 114736146. Its totient is φ = 24674400.

The previous prime is 61686049. The next prime is 61686071. The reversal of 61686050 is 5068616.

It can be written as a sum of positive squares in 3 ways, for example, as 43784689 + 17901361 = 6617^2 + 4231^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61685998 and 61686016.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 616811 + ... + 616910.

Almost surely, 2^61686050 is an apocalyptic number.

61686050 is a deficient number, since it is larger than the sum of its proper divisors (53050096).

61686050 is a wasteful number, since it uses less digits than its factorization.

61686050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1233733 (or 1233728 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 61686050 is about 7854.0467276430. The cubic root of 61686050 is about 395.1199763734.

The spelling of 61686050 in words is "sixty-one million, six hundred eighty-six thousand, fifty".