842491307409 has 8 divisors (see below), whose sum is σ = 1123329475392. Its totient is φ = 561657005520.

The previous prime is 842491307309. The next prime is 842491307461. The reversal of 842491307409 is 904703194248.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 842491307409 - 2¹³ = 842491299217 is a prime.

It is a super-2 number, since 2×842491307409² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (842491307309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 412714 + ... + 1362099.

It is an arithmetic number, because the mean of its divisors is an integer number (140416184424).

Almost surely, 2^842491307409 is an apocalyptic number.

It is an amenable number.

842491307409 is a deficient number, since it is larger than the sum of its proper divisors (280838167983).

842491307409 is a wasteful number, since it uses less digits than its factorization.

842491307409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1933047.

The product of its (nonzero) digits is 1741824, while the sum is 51.

The spelling of 842491307409 in words is "eight hundred forty-two billion, four hundred ninety-one million, three hundred seven thousand, four hundred nine".