781130222112 has 24 divisors (see below), whose sum is σ = 2050466833296. Its totient is φ = 260376740672.

The previous prime is 781130222111. The next prime is 781130222123. The reversal of 781130222112 is 211222031187.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×781130222112² (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 781130222112.

It is not an unprimeable number, because it can be changed into a prime (781130222111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4068386478 + ... + 4068386669.

It is an arithmetic number, because the mean of its divisors is an integer number (85436118054).

Almost surely, 2^781130222112 is an apocalyptic number.

It is an amenable number.

781130222112 is an abundant number, since it is smaller than the sum of its proper divisors (1269336611184).

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

781130222112 is a wasteful number, since it uses less digits than its factorization.

781130222112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8136773160 (or 8136773152 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 30.

Adding to 781130222112 its reverse (211222031187), we get a palindrome (992352253299).

The spelling of 781130222112 in words is "seven hundred eighty-one billion, one hundred thirty million, two hundred twenty-two thousand, one hundred twelve".