3806778555847 has 16 divisors (see below), whose sum is σ = 3874290783552. Its totient is φ = 3739889986560.

The previous prime is 3806778555841. The next prime is 3806778555889. The reversal of 3806778555847 is 7485558776083.

It is a cyclic number.

It is not a de Polignac number, because 3806778555847 - 2¹⁹ = 3806778031559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3806778555847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3806778555841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15579873 + ... + 15822325.

It is an arithmetic number, because the mean of its divisors is an integer number (242143173972).

Almost surely, 2^{3806778555847} is an apocalyptic number.

3806778555847 is a deficient number, since it is larger than the sum of its proper divisors (67512227705).

3806778555847 is a wasteful number, since it uses less digits than its factorization.

3806778555847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243738.

The product of its (nonzero) digits is 1580544000, while the sum is 73.

The spelling of 3806778555847 in words is "three trillion, eight hundred six billion, seven hundred seventy-eight million, five hundred fifty-five thousand, eight hundred forty-seven".