1421179817208 has 128 divisors (see below), whose sum is σ = 3626850816000. Its totient is φ = 463937471360.

The previous prime is 1421179817207. The next prime is 1421179817227. The reversal of 1421179817208 is 8027189711241.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421179817207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 577949083 + ... + 577951541.

It is an arithmetic number, because the mean of its divisors is an integer number (28334772000).

Almost surely, 2^{1421179817208} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421179817208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1813425408000).

1421179817208 is an abundant number, since it is smaller than the sum of its proper divisors (2205670998792).

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

1421179817208 is a wasteful number, since it uses less digits than its factorization.

1421179817208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3905 (or 3901 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 51.

The spelling of 1421179817208 in words is "one trillion, four hundred twenty-one billion, one hundred seventy-nine million, eight hundred seventeen thousand, two hundred eight".