65361990 has 16 divisors (see below), whose sum is σ = 156868848. Its totient is φ = 17429856.

The previous prime is 65361977. The next prime is 65362009. The reversal of 65361990 is 9916356.

65361990 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 7 ways as a sum of consecutive naturals, for example, 1089337 + ... + 1089396.

It is an arithmetic number, because the mean of its divisors is an integer number (9804303).

Almost surely, 2^65361990 is an apocalyptic number.

65361990 is an abundant number, since it is smaller than the sum of its proper divisors (91506858).

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

65361990 is a wasteful number, since it uses less digits than its factorization.

65361990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2178743.

The product of its (nonzero) digits is 43740, while the sum is 39.

The square root of 65361990 is about 8084.6762458369. The cubic root of 65361990 is about 402.8175855948.

The spelling of 65361990 in words is "sixty-five million, three hundred sixty-one thousand, nine hundred ninety".