9779422842 has 96 divisors (see below), whose sum is σ = 25314128640. Its totient is φ = 2790365760.

The previous prime is 9779422841. The next prime is 9779422901. The reversal of 9779422842 is 2482249779.

It is a happy number.

9779422842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×9779422842² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (9779422841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2408478 + ... + 2412534.

It is an arithmetic number, because the mean of its divisors is an integer number (263688840).

Almost surely, 2^9779422842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9779422842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12657064320).

9779422842 is an abundant number, since it is smaller than the sum of its proper divisors (15534705798).

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

9779422842 is a wasteful number, since it uses less digits than its factorization.

9779422842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4993 (or 4980 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 54.

The square root of 9779422842 is about 98890.9644103039. The cubic root of 9779422842 is about 2138.4761359989.

The spelling of 9779422842 in words is "nine billion, seven hundred seventy-nine million, four hundred twenty-two thousand, eight hundred forty-two".