850249039890 has 64 divisors (see below), whose sum is σ = 2140695164160. Its totient is φ = 215831374080.

The previous prime is 850249039889. The next prime is 850249039891. The reversal of 850249039890 is 98930942058.

It is an interprime number because it is at equal distance from previous prime (850249039889) and next prime (850249039891).

It is a super-2 number, since 2×850249039890² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 850249039890.

It is not an unprimeable number, because it can be changed into a prime (850249039891) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6820609 + ... + 6944148.

It is an arithmetic number, because the mean of its divisors is an integer number (33448361940).

Almost surely, 2^850249039890 is an apocalyptic number.

850249039890 is an abundant number, since it is smaller than the sum of its proper divisors (1290446124270).

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

850249039890 is a wasteful number, since it uses less digits than its factorization.

850249039890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13764867.

The product of its (nonzero) digits is 5598720, while the sum is 57.

The spelling of 850249039890 in words is "eight hundred fifty billion, two hundred forty-nine million, thirty-nine thousand, eight hundred ninety".