7855856794739 has 4 divisors (see below), whose sum is σ = 7855862920656. Its totient is φ = 7855850668824.

The previous prime is 7855856794693. The next prime is 7855856794769. The reversal of 7855856794739 is 9374976585587.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7855856794739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7855856794769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321404 + ... + 3976809.

It is an arithmetic number, because the mean of its divisors is an integer number (1963965730164).

Almost surely, 2^{7855856794739} is an apocalyptic number.

7855856794739 is a deficient number, since it is larger than the sum of its proper divisors (6125917).

7855856794739 is a wasteful number, since it uses less digits than its factorization.

7855856794739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6125916.

The product of its digits is 16003008000, while the sum is 83.

The spelling of 7855856794739 in words is "seven trillion, eight hundred fifty-five billion, eight hundred fifty-six million, seven hundred ninety-four thousand, seven hundred thirty-nine".