7804781705138 has 64 divisors (see below), whose sum is σ = 13454283997440. Its totient is φ = 3360931833600.

The previous prime is 7804781705137. The next prime is 7804781705173. The reversal of 7804781705138 is 8315071874087.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (7804781705137) 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, 147620828 + ... + 147673688.

It is an arithmetic number, because the mean of its divisors is an integer number (210223187460).

Almost surely, 2^{7804781705138} is an apocalyptic number.

7804781705138 is a deficient number, since it is larger than the sum of its proper divisors (5649502292302).

7804781705138 is a wasteful number, since it uses less digits than its factorization.

7804781705138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55683.

The product of its (nonzero) digits is 10536960, while the sum is 59.

The spelling of 7804781705138 in words is "seven trillion, eight hundred four billion, seven hundred eighty-one million, seven hundred five thousand, one hundred thirty-eight".