849991188240 has 160 divisors (see below), whose sum is σ = 2928826114560. Its totient is φ = 226580806656.

The previous prime is 849991188209. The next prime is 849991188301. The reversal of 849991188240 is 42881199948.

849991188240 is a `hidden beast` number, since 8 + 499 + 9 + 118 + 8 + 24 + 0 = 666.

It is a super-2 number, since 2×849991188240² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5905612 + ... + 6047828.

It is an arithmetic number, because the mean of its divisors is an integer number (18305163216).

Almost surely, 2^849991188240 is an apocalyptic number.

849991188240 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 849991188240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1464413057280).

849991188240 is an abundant number, since it is smaller than the sum of its proper divisors (2078834926320).

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

849991188240 is a wasteful number, since it uses less digits than its factorization.

849991188240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145006 (or 144994 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 63.

The spelling of 849991188240 in words is "eight hundred forty-nine billion, nine hundred ninety-one million, one hundred eighty-eight thousand, two hundred forty".