7809208821042 has 16 divisors (see below), whose sum is σ = 16040537038272. Its totient is φ = 2532716374320.

The previous prime is 7809208821041. The next prime is 7809208821047. The reversal of 7809208821042 is 2401288029087.

It is not an unprimeable number, because it can be changed into a prime (7809208821041) 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, 17588307934 + ... + 17588308377.

It is an arithmetic number, because the mean of its divisors is an integer number (1002533564892).

Almost surely, 2^{7809208821042} is an apocalyptic number.

7809208821042 is an abundant number, since it is smaller than the sum of its proper divisors (8231328217230).

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

7809208821042 is a wasteful number, since it uses less digits than its factorization.

7809208821042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35176616353.

The product of its (nonzero) digits is 1032192, while the sum is 51.

The spelling of 7809208821042 in words is "seven trillion, eight hundred nine billion, two hundred eight million, eight hundred twenty-one thousand, forty-two".