61655650 has 24 divisors (see below), whose sum is σ = 131063040. Its totient is φ = 21138960.

The previous prime is 61655639. The next prime is 61655707. The reversal of 61655650 is 5655616.

61655650 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 11 ways as a sum of consecutive naturals, for example, 87730 + ... + 88429.

It is an arithmetic number, because the mean of its divisors is an integer number (5460960).

Almost surely, 2^61655650 is an apocalyptic number.

61655650 is an abundant number, since it is smaller than the sum of its proper divisors (69407390).

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

61655650 is a wasteful number, since it uses less digits than its factorization.

61655650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176178 (or 176173 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 61655650 is about 7852.1111810774. Note that the first 4 decimals coincide. The cubic root of 61655650 is about 395.0550582868.

Subtracting from 61655650 its sum of digits (34), we obtain a palindrome (61655616).

The spelling of 61655650 in words is "sixty-one million, six hundred fifty-five thousand, six hundred fifty".