671127204707442 has 144 divisors (see below), whose sum is σ = 1746119296426752. Its totient is φ = 185560893040320.

The previous prime is 671127204707381. The next prime is 671127204707467. The reversal of 671127204707442 is 244707402721176.

671127204707442 is a `hidden beast` number, since 6 + 7 + 1 + 127 + 2 + 0 + 4 + 70 + 7 + 442 = 666.

671127204707442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1310710908 + ... + 1311222840.

It is an arithmetic number, because the mean of its divisors is an integer number (12125828447408).

Almost surely, 2^{671127204707442} is an apocalyptic number.

671127204707442 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 671127204707442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (873059648213376).

671127204707442 is an abundant number, since it is smaller than the sum of its proper divisors (1074992091719310).

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

671127204707442 is a wasteful number, since it uses less digits than its factorization.

671127204707442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559933 (or 559923 counting only the distinct ones).

The product of its (nonzero) digits is 7375872, while the sum is 54.

The spelling of 671127204707442 in words is "six hundred seventy-one trillion, one hundred twenty-seven billion, two hundred four million, seven hundred seven thousand, four hundred forty-two".