65181090 has 64 divisors (see below), whose sum is σ = 170303616. Its totient is φ = 15869952.

The previous prime is 65181089. The next prime is 65181091. The reversal of 65181090 is 9018156.

It is a happy number.

65181090 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (65181089) and next prime (65181091).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (65181091) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 36969 + ... + 38691.

It is an arithmetic number, because the mean of its divisors is an integer number (2660994).

Almost surely, 2^65181090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65181090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85151808).

65181090 is an abundant number, since it is smaller than the sum of its proper divisors (105122526).

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

65181090 is a wasteful number, since it uses less digits than its factorization.

65181090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1843.

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 65181090 is about 8073.4806620193. The cubic root of 65181090 is about 402.4456210372.

The spelling of 65181090 in words is "sixty-five million, one hundred eighty-one thousand, ninety".