844157838407 has 16 divisors (see below), whose sum is σ = 933477242880. Its totient is φ = 758578342752.

The previous prime is 844157838373. The next prime is 844157838413. The reversal of 844157838407 is 704838751448.

It is a cyclic number.

It is not a de Polignac number, because 844157838407 - 2⁶ = 844157838343 is a prime.

It is a super-2 number, since 2×844157838407² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (844157838427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5263703 + ... + 5421704.

It is an arithmetic number, because the mean of its divisors is an integer number (58342327680).

Almost surely, 2^844157838407 is an apocalyptic number.

844157838407 is a deficient number, since it is larger than the sum of its proper divisors (89319404473).

844157838407 is a wasteful number, since it uses less digits than its factorization.

844157838407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10685582.

The product of its (nonzero) digits is 24084480, while the sum is 59.

The spelling of 844157838407 in words is "eight hundred forty-four billion, one hundred fifty-seven million, eight hundred thirty-eight thousand, four hundred seven".