850122458640 has 480 divisors, whose sum is σ = 3516090789120. Its totient is φ = 179251605504.

The previous prime is 850122458639. The next prime is 850122458641. The reversal of 850122458640 is 46854221058.

850122458640 is a `hidden beast` number, since 8 + 5 + 0 + 1 + 2 + 24 + 586 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (850122458639) and next prime (850122458641).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (850122458641) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 136475046 + ... + 136481274.

It is an arithmetic number, because the mean of its divisors is an integer number (7325189144).

Almost surely, 2^850122458640 is an apocalyptic number.

850122458640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 850122458640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1758045394560).

850122458640 is an abundant number, since it is smaller than the sum of its proper divisors (2665968330480).

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

850122458640 is a wasteful number, since it uses less digits than its factorization.

850122458640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8351 (or 8342 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 45.

Adding to 850122458640 its reverse (46854221058), we get a palindrome (896976679698).

The spelling of 850122458640 in words is "eight hundred fifty billion, one hundred twenty-two million, four hundred fifty-eight thousand, six hundred forty".