65850831222 has 128 divisors (see below), whose sum is σ = 154422374400. Its totient is φ = 18523814400.

The previous prime is 65850831181. The next prime is 65850831227. The reversal of 65850831222 is 22213805856.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65850831227) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9311904 + ... + 9318972.

It is an arithmetic number, because the mean of its divisors is an integer number (1206424800).

Almost surely, 2^65850831222 is an apocalyptic number.

65850831222 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 65850831222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77211187200).

65850831222 is an abundant number, since it is smaller than the sum of its proper divisors (88571543178).

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

65850831222 is a wasteful number, since it uses less digits than its factorization.

65850831222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7302.

The product of its (nonzero) digits is 230400, while the sum is 42.

The spelling of 65850831222 in words is "sixty-five billion, eight hundred fifty million, eight hundred thirty-one thousand, two hundred twenty-two".